Question 1: Solution 1:
|
|
|
- Mitchell Rice
- 5 years ago
- Views:
Transcription
1 Book Name: Selina Concise Question 1: Comment, sulphuric acid is referred to as: (a) King of chemicals (b) Oil of vitriol Solution 1: (a) Sulphuric acid is called King of Chemicals because there is no other manufactured compound which is used by such a large number of key industries. (b) Sulphuric acid is referred to as Oil of vitriol as it was obtained as an oily viscous liquid by heating crystals of green vitriol. Question 2: Sulphuric acid is manufactured by contact process (a) Give two balanced equations to obtain SO2 in this process. (b) Give the conditions for the oxidation of SO2 Solution 2: (a) Two balanced equations to obtain SO2 is: (i) 4FeS2 + 11O2 2Fe 2 O 3 + 8SO 2 (ii) S + O2 SO2 (b) The conditions for the oxidation of SO2 are: (i) The temperature should be as low as possible. The yield has been found to be maximum at about C 450 o C (ii) High pressure (2 atm) is favoured because the product formed has less volume than reactant. (iii) Excess of oxygen increases the production of sulphur trioxide. (iv) Vanadium pentoxide or platinised asbestos is used as catalyst. (c) Sulphuric acid is not obtained directly by reacting SO3 with water because the reaction is highly exothermic which produce the fine misty droplets of sulphuric acid that is not directly absorbed by water. (d) The chemical used to dissolve SO3 is concentrated sulphuric acid. The product formed is oleum. (e) Main reactions of this process are: S O2 SO 2 2SO 2 O 2 SO3 V2 OS 450 C 2SO3 H2 SO4 H2 S2 O7 H2 S2 O7 H2 O 2H 2 SO 4
2 Question 3: Why is water not added to concentrated H2SO4 in order to dilute it? Solution 3: Water is not added to concentrated acid since it is an exothermic reaction. If water is added to the acid, there is a sudden increase in temperature and the acid being in bulk tends to spurt out with serious consequences. Question 4: Why the impurity of arsenic oxide must be removed before passing the mixture of SO4 and air through the catalytic chamber? Solution 4: Impurity of ARSENIC poisons the catalyst [i.e. deactivates the catalyst]. So, it must be removed before passing the mixture of SO2 air through the catalytic chamber. Question 5: Give two balanced reactions of each type to show the following properties of sulphuric acid: (a) Acidic nature. (b) Oxidising agent, (c) Hygroscopic nature, (d) Non-volatile nature Solution 5: Balanced reactions are: (a) Acidic nature: (i) Dilute H2SO4 reacts with basic oxides to form sulphate and water. 2 NaOH + H2SO4 Na2SO4 + 2H2O (ii) CuO + H2SO4 CuSO4 + H2O (iii) It reacts with carbonate to produce CO2. Na2CO3 + H2SO4 Na2SO4 + H2O + CO2 (b) Oxidising agent: H2SO4 H2O +SO2 + [O] Nascent oxygen oxidizes non-metals, metals and inorganic compounds. For example, Carbon to carbon dioxide C+H2SO4 CO2 +H2O +2SO2 Sulphur to sulphur dioxide S +H2SO4 3SO2 +2H2O
3 (c) Hygroscopic nature: It has great affinity for water. It readily absorbs moisture from conc.h SO atmospheric air. HCOOH 2 4 CO + H2 O conc.h C6H12O6 2 SO 4 6C + 6H2O (d) Non-volatile nature: It has a high boiling point (356 o C) so it is considered to be non-volatile. Therefore, it is used for preparing volatile acids like hydrochloric acid, nitric acid from their salts by double decomposition reaction. NaCl + H2SO4 NaHSO4 + HCl KCl + H2SO4 KHSO4 + HCl Question 6: Give a chemical test to distinguish between: (a) dilute sulphuric acid and dilute hydrochloric acid (b) dilute sulphuric acid and conc. Sulphuric acid Solution 6: (a) Bring a glass rod dipped in Ammonia solution near the mouth of each test tubes containing dil. Hel and dil. H2SO4each. Dil HCl Dil. H2SO4 White fumes of ammonium No such fumes chloride (b) 1. Dilute sulphuric acid treated with zinc gives Hydrogen gas which bums with pop sound. Concentrated H2SO4 gives SO2 gas with zinc and the gas turns Acidified potassium dichromate paper green. 2. Barium chloride solution gives white ppt. with dilute H2SO4, This white ppt. is insoluble in all acids. Concentrated H2SO4 and NaCl mixture when heated gives dense white fumes if glass rod dipped in Ammonia solution is brought near it. Question 7: Name the products formed when hot and concentrated sulphuric acid reacts with the following: (a) Sulphur (b) NaOH, (c) Sugar (d) Carbon (e) Copper.
4 Solution 7: (a) When sulphuric acid reacts with sulphur the product formed is Sulphur dioxide is formed. S +2H2SO4 3SO2 + 2H2O (b) When sulphuric acid reacts with sodium hydroxide it neutralizes base to form sodium sulphate. 2NaOH + H2SO4 Na2SO4 + 2H2O (c) When sulphuric acid reacts with sugar it forms carbon C12 H22O11 conc.h 2 SO 4 12C + 11H2O (d) When sulphuric acid reacts with carbon it forms carbon dioxide and sulphur dioxide gas. C + 2H2SO4 CO2 + 2H2O + 2SO2 (e) When sulphuric acid reacts with copper it forms copper sulphate and sulphur dioxide. Cu + H2SO4 CuSO4 + 2H2O + SO2 Question 8: Why is: (a) Concentrated sulphuric acid kept in air tight bottles? (b) H2SO4 not a drying agent for H2S? (c) Sulphuric acid used in the preparation of HCI and HNO3? Give equations in both cases. Solution 8: (a) Concentrated sulphuric acid is hygroscopic substance that absorbs moisture when exposed to air. Hence, it is stored in air tight bottles. (b) Sulphuric acid is not a drying agent for H2S because it reacts with H2S to form sulphur. H2SO4 + H2S 2H2O + SO2 + S (c) Concentrated sulphuric acid has high boiling point (356 o C). So, it is considered to be non-volatile. Hence, it is used for preparing volatile acids like Hydrochloric acid and Nitric acids from their salts by double decomposition. NaCl + H2SO4 NaHSO4 + HCl NaNO3 + H2SO4 NaHSO4 + HNO3 Question 9: What property of conc. H2SO4 is made use of in each of in each of the following cases? Give an equation for the reaction on each case: (a) in the production of HCI gas when it reacts with a chloride, (b) in the preparation of CO and HCOOH,
5 (c) as a source of hydrogen by diluting it and adding a strip of magnesium. (d) in the preparation of sulphur dioxide by warming a mixture of conc. Sulphuric acid and copper turnings, (e) Hydrogen sulphide gas is passed through concentrated sulphuric acid. Solution 9: (a) Due to its reducing property. i.e, it is a non-volatile acid. NaCl + H2SO4 NaHSO4 + HCl (Conc.) (b) It is a dehydrating agent. HCOOH conc.h 2 SO 4 CO + H2O (c) Magnesium is present above hydrogen in the reactivity series so sulphuric acid is able to liberate hydrogen gas by reacting with magnesium strip. Mg + H2SO4 MgSO4 + H2 (d) Due to its oxidizing character Cu + H2SO4 CuSO4 + 2H2O + SO2 (e) Due to its oxidizing property Hydrogen sulphide gas is passed through concentrated sulphuric acid to liberate sulphur dioxide and sulphur is formed. H2S + H2SO4 S + 2H2O + SO2 Question 10: What is the name given to the salts of: (a) sulphurous acid (b) sulphuric acid? Solution 10: The name of the salt of (a) Hydrogen sulphites and Sulphites. (b) Sulphate and bisulphate. Question 11: Give reasons for the following: (a) Sulphuric acid forms two types of salts with NaOH, (b) Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide. (c) A piece of wood becomes black when concentrated sulphuric acid is poured on it, (d) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
6 Solution 11: (a) Two types of salts are formed when sulphuric acid reacts with NaOH because sulphuric acid is dibasic. NaOH + H2SO4 NaHSO4 + H2O 2NaOH + H2SO4 Na2SO4 + 2H2O (b) When hydrogen bromide reacts with sulphuric acid the bromine gas is obtained which produce red brown vapours. 2KBr + 3H2SO4 2KHSO4 + SO2 + Br2 + 2H2O (c) A piece of wood becomes black when concentrated sulphuric acid is poured on it because it gives a mass of carbon. (d) When sulphuric acid is added to sodium carbonate it liberates carbon dioxide which produces brisk effervescence. Na2CO3 + H2SO4 Na2SO4 + H2O + CO2 Question 12: Copy and complete the following table: Column 1 Column 2 Column 3 Substance reacted Dilute or concentrated Gas with acid acid Hydrogen Carbon dioxide only chlorine Solution 12: Column 1 Column 2 Column 3 Substance reacted Dilute or concentrated Gas with acid acid Substance reacted with Dilute or concentrated Gas acid sulphuric acid Zinc Dilute sulphuric acid Hydrogen Calcium carbonate Concentrated sulphuric acid Carbon dioxide Bleaching power Dilute sulphuric acid only chlorine CaOCl2
7 Question 1(2004): Name a gas that can be oxidized to sulphur. Solution 1(2004): Hydrogen sulphide (H2S) can be oxidized to sulphur. Question 2(2004): Give the odour of the gas evolved and name the gas produced when sodium sulphide is added to solution of HCI in water. Solution 2(2004): When sodium sulphide is added to solution of HCl, Hydrogen sulphide gas is produced. It has rotten egg like smell. Question 3(2004): (a) Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C. (b) In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-steps procedure is used. Write the equations for the two steps involved in D. (c) What type of substance will liberate sulphur dioxide from sodium sulphite in step E? (d) Write the equation for the reaction by which sulphure dioxide is converted to sodium sulphite in step F. Solution 3(2004): (a) The catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C is Vanadium pentoxide. (b) The two steps for the conversion of sulphur trioxide to sulphuric acid is: (i) SO3 + H2SO4 H2S2O7 (ii) H2S2O7 + H2O 2H2SO4 (c) The substance that will liberate sulphur dioxide in step E is dilute H2SO4.
8 (d) The equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F is: SO2 + 2NaOH Na2SO3 + H2O Or Na2O + SO2 Na2SO3 Question 1(2006): (a) Name the process used for the large-scale manufacture of sulphuric acid. (b) Which property of sulphuric acid accounts for its use as a dehydrating agent? (c) Concentrated sulphuric acid is both an oxidizing agent and a non-volatile acid. Write one equation each to illustrate the above mentioned properties of sulphuric acid. Solution 1(2006): (a) The process used for the large-scale manufacture of sulphuric acid is Contact process. (b) Sulphuric acid has great affinity for water. It readily removes element of water from other compound. Thus it acts as a dehydrating agent. (c) Concentrated acid is non-volatile thus it is used for the preparation of volatile acids: NaCl + H2SO4 NaHSO4 + HCl Concentrated acid act as an oxidizing agent: C + 2H2SO4 CO2 + 2H2O + 2SO2 Question 1(2007): Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v) some properties may be repeated. A. Acid B. Dehydrating agent C. Non-volatile acid D. Oxidizing agent (i) C12H22O11 + NH2SO4 12C + 11H2O + nh2so4 (ii) S 2H 2 SO 4 3SO 2 2H 2 O (iii) NaCI H 2 SO 4 NaHSO 4 (iv) CuO H 2 SO 4 CuSO 4 H 2 O HCI (v) Na 2 CO3 H 2 SO 4 Na 2 SO 4 H 2 O CO 2 Solution 1(2007): (i) B (ii) D (iii) C (iv) A (v) A
9 Question 2(2007): (a) Name the acid formed when sulphur dioxide dissolves in water (b) Name the gas released when sodium carbonate is added to a solution of sulphur dioxide. Solution 2(2007): (a) The acid formed when sulphur dioxide dissolves in water is sulphurous acid. (b) Carbondioxide gas is released when sodium carbonate is added to solution of sulphur dioxide. Question 1(2008): (a) What is the property of concentrated sulphuric acid which allows it to be used in the preparation of hydrogen chloride and nitric acid? (b) What property of concentrated sulphuric acid is in action when sugar turns black in its presence? Solution 1(2008): (a) Concentrated sulphuric acid is non-volatile; hence it is used for the preparation of higher volatile acids. (b) Due to its dehydrating nature sugar turns black in the presence of concentrated sulphuric acid.
ICSE Board Class X Chemistry Board Paper 2014 Solution SECTION I
ICSE Board Class X Chemistry Board Paper 2014 Solution SECTION I Answer 1 1) D 2) B 3) C 4) A 5) C 6) A 7) D 8) C 9) A 10) D 11) 1 12) Sodium ethoxide 13) CaO is alkaline 14) Downward displacement of air
CHEMISTRY PAPER 1999
CHEMISTRY PAPER 1999 (One and a half hours) Answers to this paper must be written on the paper provided separately. You will NOT be allowed to write during the first 15 minutes. This time is to be spent
1 Chemical Reactions and Equations
1 Intext Questions On Page 6 Question 1. Why should a magnesium ribbon be cleaned before burning in air? Magnesium ribbon reacts with CO present in air to form a protective and inert layer of magnesium
Chapter 1 Chemical Reactions & Equations
CBSE Class 10th NCERT Science Chapter 1 Chemical Reactions & Equations Intext Questions On Page 6 Question 1: Why should a magnesium ribbon be cleaned before burning in air? Magnesium is an extremely reactive
Class X. Exercises solution
Exercises solution Question 1: Which of the statements about the reaction below are incorrect? Lead is getting reduced. Carbon dioxide is getting oxidised. Carbon is getting oxidised. Lead oxide is getting
for free revision past papers visit:
NAME ADM NO:. STUNDENT S SIGNATURE DATE.. SCHOOL 233/2 FORM THREE CHEMISTRY THEORY Paper 2 END YEAR 2017 EXAMS. Time: 2 Hrs FORM THREE CHEMISTRY 233/2 INSTRUCTIONS TO CANDIDATES Write your Name and Index
Chemical Reactions and Equations
Chemical Reactions and Equations Question 1: Why should a magnesium ribbon be cleaned before burning in air? Magnesium is very reactive metal. When stored it reacts with oxygen to form a layer magnesium
ICSE Chemistry Board Paper 2016
2015 Time: 2 hours; Max. Marks: 80 General Instructions: Answers to this Paper must be written on the paper provided separately. You will not be allowed 10 write during the first 15 minutes. This time
CHEMICAL REACTIONS & EQUATIONS
CHEMICAL REACTIONS & EQUATIONS PHYSICAL AND CHEMICAL CHANGE In our daily life many processes occur around us. Some of them do not lead to formation of any new substance, while others may lead to formation
ICSE Chemistry Model Paper-9
ICSE Chemistry Model Paper-9 Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the
Website: Page 1. Page 14»Exercise» Page 15» Question 1:
Page 14»Exercise» Question 1: Which of the statements about the reaction below are incorrect? (a) Lead is getting reduced. (b) Carbon dioxide is getting oxidised. (c) Carbon is getting oxidised. (d) Lead
MAHESH TUTORIALS I.C.S.E.
MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - I-SET -A 008 Sulphuric acid, Ammonia, Analytical Chemistry, Organic Chemistry HCl, Nitric acid, Metallurgy Chemistry SCIENCE
9.1 Qualitative Analysis
Chemistry Form 4 Page 44 Ms. R. Buttigieg Test for positive Ions (Cations) 9.1 Qualitative Analysis 1) Flame Tests Nichrome wire is dipped in concentrated hydrochloric acid, then in the salt being tested.
ICSE Board. Class X Chemistry. Board Paper Time: 1½ hrs Total Marks: 80
ICSE Board Class X Chemistry Board Paper 2013 Time: 1½ hrs Total Marks: 80 General Instructions: 1. Answers to this paper must be written on the paper provided separately. 2. You will NOT be allowed to
Question Bank Ammonia
Question Bank Ammonia 1. Why nitrogenous matter produces ammonia? State a liquid source of ammonia. Ans. When nitrogenous matter (such as animal and vegetable proteins) decays in the absence of air, the
MC 17 C - 6 SECTION - I
SECTION - I (40 marks) Compulsory : Attempt all questions from this section. Question 1. (a) Name the gas in each of the following : An alkaline gas which gives dense white fumes with hydrogen chloride.
ICSE Board Class X Chemistry Board Paper Time: 1½ hrs Total Marks: 80
ICSE Board Class X Chemistry Board Paper 2011 Time: 1½ hrs Total Marks: 80 General Instructions: 1. Answers to this paper must be written on the paper provided separately. 2. You will NOT be allowed to
CHEMISTRY. SCIENCE Paper 2. (Two hours) You will not be allowed to write during the first 15 minutes.
CLASS IX CHEMISTRY SCIENCE Paper 2 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent
MAHESH TUTORIALS I.C.S.E.
MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - II - SET -A 020 Periodic Table, Chemical bonding, Acid, Bases and Salts, Practical Work, Mole Concept, Electrolysis Chemistry
CHEMISTRY. SCIENCE Paper 2
CHEMISTRY SCIENCE Paper 2 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading
ICSE-2010 Section 1(40 Marks) (Attempt all questions from this section) Question 1 [5]
![ICSE-2010 Section 1(40 Marks) (Attempt all questions from this section) Question 1 [5]](/thumbs/88/117103030.jpg "ICSE-2010 Section 1(40 Marks) (Attempt all questions from this section) Question 1 [5]")
MR D HR UV AS HE R ICSE BOA RD PAP ER 201 0 1 ICSE-2010 Section 1(40 Marks) (Attempt all questions from this section) Question 1 (a) From the list given below, select the word(s) required to correctly
For the element X in the ionic compound MX, explain the meaning of the term oxidation state.
1. (a) By referring to electrons, explain the meaning of the term oxidising agent.... For the element X in the ionic compound MX, explain the meaning of the term oxidation state.... (c) Complete the table
CHEMISTRY. SCIENCE Paper 2
CHEMISTRY SCIENCE Paper 2 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading
CHAPTER 8 SALTS. NaCl. A salt is an ionic substance produced when the hydrogen ion of the acid is replaced by metal ion or an ammonium ion.
CHAPTER 8 SALTS A salt is an ionic substance produced when the hydrogen ion of the acid is replaced by metal ion or an ammonium ion. The salt consists of two parts, cation from base and anion from acid.
Chapter 19 Acids and Bases
Chapter 19 Acids and Bases p.1/11 19.1 Introducing Acids and Alkalis Acids and bases are common stuff in everyday life. Domestic Acids and Alkalis Common domestic acids Many foods and drinks contain acids.
CHAPTER No. 1 CHEMICAL REACTIONS AND EQUATIONS HOTS: (High Order Thinking Skill) Questions with Answers: 1 A compound `X` is used for drinking, has ph =7.Its acidified solution undergoes decomposition
2.3 Group 7 The Halogens
2.3 Group 7 The Halogens Physical properties of the Halogens: The melting and boiling point of the halogens increases with atomic number due to increased van der Waals (from increased number of electrons).
LLT Education Services
Rahul Arora 18. What chemical reaction is involved in the corrosion of iron? 19. Aluminum metal when burnt in air forms aluminium oxide. Write the balanced chemical equation for the reaction. 20. Is the
ICSE Board Class IX Chemistry Paper 5 Solution
ICSE Board Class IX Chemistry Paper 5 Solution SECTION I Answer 1 i. Dalton used the symbol for oxygen and the symbol for hydrogen. Symbol represents gram atom(s) of an element. i Symbolic expression for
ICSE QUESTION PAPER Class X Chemistry (2016) Solution
ICSE QUESTION PAPER Class X Chemistry (016) Solution Section I 1. Metals are good reducing agents because they are electron donors. Electrovalent compounds have high melting points. (iii) Higher the ph
Page 1 of 14. Website: Mobile:
Question 1: You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red
Class X Chapter 03 Acids, Bases and Salts Chemistry
INTEXT - QUESTION- 1 Book Name: Selina Concise Question 1: What do you understand by the terms, acid and base? Solution 1: (a) Acids are defined as compounds which contain one or more hydrogen atoms, and
IGCSE TEST_ (Ch. 2,3,4,5,6) Name... Date...
IGCSE TEST_ (Ch. 2,3,4,5,6) Name... Date... 1 Winston Churchill, a British Prime Minister, had his false teeth electroplated with gold. The teeth were coated with a thin layer of carbon and were then placed
burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3
1 Crystals of sodium sulphate-10-water, Na 2 SO 4.10H 2 O, are prepared by titration. burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3 (a)
MC 17 C SECTION - I (40 marks) Compulsory : Attempt all questions from this section.
Question 1. (a) SECTION - I (40 marks) Compulsory : Attempt all questions from this section. Choose from the following list of substances, as to what matches the description from to given below : [Bronze,
X - ICSE BOARD
Rao IIT Academy/ ICSE - Board 018_Std X_Chemistry_QP + Solutions JEE MEDICAL-UG BOARDS KVPY NTSE OLYMPIADS X - ICSE BOARD - 018 Date: 19.03.018 CHEMISTRY - QP + SOLUTIONS SECTION - I (40 Marks) Attempt
BELPAHAR ENGLISH MEDIUM SCHOOL. Pre-Final Examination CLASS X SUB CHEMISTRY FM :80 TIME : 1 1/2 hours
BELPAHAR ENGLISH MEDIUM SCHOOL Pre-Final Examination- 2008 CLASS X SUB CHEMISTRY FM :80 TIME : 1 1/2 hours Answers to this Paper must be written on the paper provided separately. You will not be allowed
MC 17 C SECTION - I (40 marks) Compulsory : Attempt all questions from this section.
Question 1 (a) SECTION - I (40 marks) Compulsory : Attempt all questions from this section Select from the list given below (A to G), only one in each case which matches with the description given below:
EXPERIMENTS. Testing products of combustion: Reducing Copper(III) Oxide to Copper. Page 4
APPARATUS Page 2 APPARATUS Page 3 Reducing Copper(III) Oxide to Copper EXPERIMENTS Page 4 Testing products of combustion: EXPERIMENTS Showing that oxygen and water is needed for rusting iron Page 5 Showing
MC 17 C - 4. B) 4g of NH 3
M 17-4 SETION - I (40 marks) ompulsory : Attempt all questions from this section. Question 1. (a) hoose the corresponding letter for the correct answer from the choices A,, and D. On moving from left to
4.4. Revision Checklist: Chemical Changes
4.4. Revision Checklist: Chemical Changes Reactivity of metals When metals react with other substances the metal atoms form positive ions. The reactivity of a metal is related to its tendency to form positive
NITROGEN AND ITS COMPOUNDS Q30 (i) Explain how the following would affect the yield of ammonia. An increase in (i). Pressure.
NAME SCHOOL INDEX NUMBER DATE NITROGEN AND ITS COMPOUNDS 1. 1990 Q30 (i) Explain how the following would affect the yield of ammonia. An increase in (i). Pressure. (2 marks) marks)... (ii) Temperature
CIE Chemistry A-Level Practicals for Papers 3 and 5
CIE Chemistry A-Level Practicals for Papers 3 and 5 Ion Identification Group 2 Ions Identification Example -3 1. Place 10 drops of 0.1 mol dm barium chloride in a clean test tube. Must be clean to ensure
2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with
Chapter 3: Chemical Formulae and Equations 1. Relative atomic mass, A r - The relative atomic mass of an element is the average mass of one atom of an element when compared with mass of an atom of carbon-12
C2.6 Quantitative Chemistry Foundation
C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen
Question Bank Organic Chemistry II
Question Bank Organic Chemistry II 1. What are saturated and unsaturated hydrocarbons. Classify the following as saturated and unsaturated hydrocarbons. CH 4, C 2 H 2, C 2 H 6, C 3 H 6, C 3 H 4 Ans. Compounds
Identification of ions and gases
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ Identification Of ions nd Gases Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International
SCIENCE JSUNIL TUTORIAL CLASS 9. Activity 1
Activity Objective To understand, that there is a change in mass when a chemical change takes place. (To understand law of conservation of mass experimentally). Procedure. Take one of the following sets,
4.4. Revision Checklist: Chemical Changes
4.4. Revision Checklist: Chemical Changes Reactivity of metals When metals react with other substances the metal atoms form positive ions. The reactivity of a metal is related to its tendency to form positive
MR. D HR UV AS HE R I.C.S.E. BOA RD PAP ER
MR D HR UV AS HE R ICSE BOA RD PAP ER 200 6 1 ICSE-2006 Section 1 (40 Marks) (Attempt all questions from this section) Question 1 (a) Select from the list given below (A to F), the o0ne substance in each
Question 8 Chemical properties of metals and nonmetals. 1) magnesium 2) sulfur trioxide 3) iron (II) hydroxide 4) sodium nitrate
Question 8 Chemical properties of metals and nonmetals 1. Calcium oxide doesn t react with 1) NaNO 3 2) HCl 3) CO 2 4) H 2 O 2. Calcium oxide reacts with both of the following 1) SO 2 and O 2 2) H 2 O
BUSIA COUNTY JOINT EVALUATION TEST-2014 JULY 2014
Name:. Class: Adm.No. CHEMISTRY Paper 1 June 2014 Time: 2 hours BUSIA COUNTY JOINT EVALUATION TEST-2014 JULY 2014 Kenya Certificate of Secondary Education CHEMISTRY PAPER 1 INSTRUCTIONS TO CANDIDATES Answer
Acid, Bases and Salts (IGCSE Chemistry Syllabus )
Acid, Bases and Salts (IGCSE Chemistry Syllabus 2016-2018) Acid o A compound when dissolved in water produces hydrogen ions (H + ) ; proton (H + ) donor o It turns blue damp litmus paper to red o ph 1
C2.6 Quantitative Chemistry Foundation
C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen
ICSE Board Class X Chemistry Board Paper 2013 Solution SECTION I
ICSE Board Class X Chemistry Board Paper 2013 Solution SECTION I 1) i. Hydronium ii. Hydroxide iii. Salt iv. Water v. Hydrogen 2) i. C 2 H 6 gas Reaction: ii. Sulphur dioxide gas is evolved. K 2 SO 3 +
CHEMISTRY SCIENCE Paper - 2
CHEMISTRY SCIENCE Paper - 2 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in
AQA Chemistry A-level
AQA Chemistry A-level Required Practical 4 Carry out simple test-tube reactions to identify cations and anions + Cations: Group 2 ions, NH 4 Test for group 2 ions: sodium hydroxide -3 1. Place 10 drops
Salts Soluble Insoluble Nitrate salts - All nitrate salts - Carbonate salts - Potassium carbonate, K 2 CO. Except
Chapter 8: Salts 1. Salts - A salt is an ionic compound. - The anion part comes from the acid while the cation part comes from a base. - Example: KCl, KOH(aq) + HCl(aq) KCl(aq) + H 2 O(l) - A salt is a
Redox. Question Paper. Cambridge International Examinations Chemical Reactions. Score: /43. Percentage: /100
Redox Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International Examinations hemical Reactions Redox Question Paper Time llowed: 52 minutes Score: /43 Percentage:
MAHESH TUTORIALS I.C.S.E.
MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - I-SET -B 008 Sulphuric acid, Ammonia, Analytical Chemistry, Organic Chemistry HCl, Nitric acid, Metallurgy Chemistry SCIENCE
Year 10 Chemistry Exam June 2011 Multiple Choice. Section A Mulltiple Choice
Year 10 Chemistry Exam June 2011 Multiple Choice Section A Mulltiple Choice 1. An aqueous solution is obtained when: a. a substance dissolves in any liquid b. a substance is dissolved in water c. when
Fluorine Gas. Chlorine Gas. Bromine Liquid. Iodine Solid
Halogens Fluorine (F 2 ): very pale yellow gas. It is highly reactive Chlorine : ( ) greenish, reactive gas, poisonous in high concentrations Bromine ( ) : red liquid, that gives off dense brown/orange
Chemical Reactions. Chemical changes are occurring around us all the time
Chemical changes are occurring around us all the time Food cooking Fuel being burned in a car s engine Oxygen being used in the human body The starting materials are called reactants The ending materials
5070/04. UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 4 Alternative to Practical
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 4 Alternative to Practical 5070/04 May/June 2005 Candidates answer on the Question Paper.
DOUBLE DISPLACEMENT REACTIONS. Double your pleasure, double your fun
DOUBLE DISPLACEMENT REACTIONS Double your pleasure, double your fun Industrial processes produce unwanted by-products. Dissolved toxic metal ions-copper, mercury, and cadmium-are common leftovers in the
NCERT Solutions. 95% Top Results. 12,00,000+ Hours of LIVE Learning. 1,00,000+ Happy Students. About Vedantu. Awesome Master Teachers
Downloaded from Vedantu NCERT Solutions About Vedantu Vedantu is India s biggest LIVE online teaching platform with over 450+ best teachers from across the country. Every week we are coming up with awesome
THE ST. MICHAEL SCHOOL THIRD FORM CHEMISTRY MANUAL 3 SYMBOLS AND FORMULAE, CHEMICAL BONDING AND CHEMICAL EQUATIONS
1 THE ST. MICHAEL SCHOOL THIRD FORM CHEMISTRY MANUAL 3 SYMBOLS AND FORMULAE, CHEMICAL BONDING AND CHEMICAL EQUATIONS COMPILED BY G.WALKER, L.WORRELL, T. HARDING REFERENCE BOOKS Anne Tindale Chemistry A
NATIONAL 5 CHEMISTRY
Farr High School NATIONAL 5 CHEMISTRY Unit 1 Chemical Changes and Structure Question Booklet 1 Rates of Reaction 1. Explain how the following would affect the rate of the reaction between 1.0 g of magnesium
Draw one line from each solution to the ph value of the solution. Solution ph value of the solution
1 The ph scale is a measure of the acidity or alkalinity of a solution. (a) Draw one line from each solution to the ph value of the solution. Solution ph value of the solution 5 Acid 7 9 Neutral 11 13
Questions Maximum Score Candidate s Score
Name:...Index Number Date... Candidate s Signature:... 233/1 CHEMISTRY Theory PAPER 1 July 2013 2 Hours STAREHE GIRLS CENTRE FORM 4 MOCK EXAMS, JULY 2013 CHEMISTRY PAPER 1 2 Hours Instructions to candidates:
S4 CHEMISTRY SUMMARY NOTES
S4 CHEMISTRY SUMMARY NOTES 1. The Mole One mole of a substance = GRAM FORMULA MASS e.g. H 2 SO 4 RAM from databook pg.7 2H 2 x 1 = 2 1S 1 x 32 = 32 4O 4 x 16 = 64 98g Mass = number of moles x Mass of 1
Chem!stry. Assignment on Redox
Chem!stry Name: ( ) Class: Date: / / Assignment on Redox Question 1: Which one of the following elements is the most powerful reducing agent? A Aluminium B Copper C Lead D Potassium Question 2: Which of
Unit 5 ACIDS, BASES & SALTS
Chemistry Form 3 Page 50 Ms. R. Buttigieg Unit 5 ACIDS, BASES & SALTS See Chemistry for You Chapter 12 pg. 142 onwards. See GCSE Chemistry Chapter 7 pg. 95 onwards INTRODUCTION ACIDS Acids have a ph less
Various Types of Reactions
Various Types of Reactions Matthew Park Outline: 1. Synthesis / Replacement / Decomposition Reactions 2. Precipitation Reactions 3. Acid-Base Reactions 4. Summary: Metathesis Reactions NOTE: Not all of
Acids, Bases & Salts
Introduction Acids, Bases & Salts Elements combine to form numerous compounds. On the basis of their chemical properties, compounds can be classified into three categories: Acids Bases Salts Acids and
PRADEEP SHARMA INSTITUTE OF COMPETITIVE STUDIES ( PICS INSTITUTE )
I. Account for the following: 1. Nitrogen is not very reactive at room temperature. 2. Maximum covalency of nitrogen is 4. 3. Nitrogen does not form any pentahalide. 4. S2 formed at higher temperatures
Year 10 Chemistry. Practice questions. Topics
Year 10 Chemistry Practice questions Topics 1 Group 1 2 Group 7 3 Reactivity series 4 Air and Water 5 Rates of reaction 6 Electrolysis 7 Acids, Alkali and Salts Objective: Evaluate group 1 & 7 reactivity
IGCSE (9-1) Edexcel - Chemistry
IGCSE (9-1) Edexcel - Chemistry Principles of Chemistry Chemical Formulae, Equations and Calculations NOTES 1.25: Write word equations and balanced chemical equations (including state symbols): For reactions
Unit-8 Equilibrium. Rate of reaction: Consider the following chemical reactions:
Unit-8 Equilibrium Rate of reaction: Consider the following chemical reactions: 1. The solution of sodium chloride and silver nitrate when mixed, there is an instantaneous formation of a precipitate of
8 Chemical Equations. Flames and sparks result when aluminum foil is dropped into liquid bromine.
8 Chemical Equations Flames and sparks result when aluminum foil is dropped into liquid bromine. Chapter Outline 8.1 The Chemical Equation 8.2 Writing and Balancing Chemical Equations 8.3 Types of Chemical
mohd faisol mansor/chemistry form 4/chapter 7 CHAPTER 7 ACIDS AND BASES HCl (g) H 2 O H + (aq) + Cl - (aq) NaOH(s) H 2 O Na + (aq) + OH - (aq)
CHAPTER 7 ACIDS AND BASES Arrhenius Theory An acid is a chemical compound that produces hydrogen ions, H + or hydroxonium ions H3O + when dissolve in water. A base defined as a chemical substance that
Year 10 Chemistry Exam June 2011 Multiple Choice. Section A Multiple Choice
Year 10 Chemistry Exam June 2011 Multiple Choice Section A Multiple Choice 1 An aqueous solution is obtained when: a. a substance dissolves in any liquid b. a substance is dissolved in water c. when a
INDIAN SCHOOL MUSCAT
INDIAN SCHOOL MUSCAT CHEMISTRY DEPARTMENT QUESTION BANK The p-block Elelments VSA QUESTIONS (1 - MARK QUESTIONS) 1. In which one of the two structures,no 2 + and NO 2 -, the bond angle has a higher value?
Unit 5 Part 1 Acids, Bases and Salts Properties of Acids, Bases and Salts UNIT 5 ACIDS, BASES AND SALTS PART 1 PROPERTIES OF ACIDS, BASES AND SALTS
UNIT 5 ACIDS, BASES AND SALTS PART 1 PROPERTIES OF ACIDS, BASES AND SALTS Contents 1. Acids, Bases, Salts and Neutralisation 2. Physical Properties of Acids, Bases and Salts 3. Strong and Weak Acids and
COMA JOINT EXAM 2014
NAME... INDEX NO... SCHOOL. CANDIDATE S SIGNATURE. 233/1 CHEMISTRY PAPER 1 (THEORY) JUNE 2014 TIME: 2 HOURS DATE.. COMA JOINT EXAM 2014 Kenya Certificate of Secondary Education. CHEMISTRY PAPER 1 (THEORY)
Chemistry Final Exam Sample Items
Chemistry Final Exam Sample Items 1. Which best describes the current atomic theory? a. Atoms consist of electrons circling in definite orbits around a positive nucleus. b. Atoms are composed of electrons
EXAM REVIEW. a b c d What would be the mass of mol of sulfuric acid?
SCH3U_2010-2011 EXAM REVIEW 1. When a chlorine atom becomes a chloride ion the: a. Ion has the same diameter as the atom b. Ion has a smaller diameter than the atom c. Ion has a larger diameter than the
Qualitative Analysis Part Two Anions & Gases
Qualitative Analysis Part Two Anions & Gases Qualitative Tests for Anions Which anions must I know the tests for? Describe tests to identify the following anions: Carbonate CO 3 2 (by the addition of dilute
Questions Booklet. UNIT 1: Principles & Applications of Science I CHEMISTRY SECTION. Level 3 Applied Science. Name:.. Teacher:..
Level 3 Applied Science UNIT 1: Principles & Applications of Science I CHEMISTRY SECTION Questions Booklet Name:.. Teacher:.. Level 3 Applied Science 2017-2018 Unit 1 (Chemistry) 1 1. State the relative
Metal + water -> metal hydroxide + hydrogen Metal + acid -> metal salt + hydrogen
Name of Formula Formula of ion Name of salt Hydrochloric Sulphuric HCl Cl - Chloride H 2 SO 4 SO 4-2 Sulphate Key words: Oxidation: loss of electrons Reduction: gain of electrons Displacement reaction:
Chemistry. Bridging the Gap Summer Homework. Name..
Chemistry Bridging the Gap Summer Homework Name.. Standard Form Number Number in standard form 0.008 8 x 10-3 0.07 7 x 10-2 0.55 5.5 x 10-1 0.000052 0.048 0.0086 0.00086 0.000086 0.0000000001 0.000455
SESSION 13: CHEMICAL REACTIONS. Key Concepts. X-planation. Physical Sciences Grade 11.
SESSION 13: CHEMICAL REACTIONS Key Concepts In this session we will focus on summarising what you need to know about: Redox reactions Direct transfer of electrons Rules for assigning oxidation numbers
ICSE Question Paper Class X Chemistry (2016)
ICSE Question Paper Class X Chemistry Time: hrs Max. Marks: 80 (016) Answers to this Paper must be written on the paper provided separately. You will not be allowed 10 write during the first 15 minutes.
# Ans Workings / Remarks
# Ans Workings / Remarks 1 B Atomic mass and temperature affects the rate of diffusion of gas. The lower the atomic mass, the lighter the substance. The higher the temperature, the higher the rate of collision
(DO NOT WRITE ON THIS TEST)
Final Prep Chap 8&9 (DO NOT WRITE ON THIS TEST) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. After the correct formula for a reactant in an equation
Name... Requirements for the task and Chemistry lessons
Name... HAUTLIEU SCHOOL CHEMISTRY Pre AS and IB Diploma Task Expectations All sections of the task will be attempted please check you have answered all questions (even those on the back page) Answers should
CHEM111 UNIT 1 MOLES, FORMULAE AND EQUATIONS QUESTIONS
Lesson 1 1. (a) Deduce the number of protons, neutrons and electrons in the following species: (i) 37 Cl - (ii) 1 H + (iii) 45 Sc 3+ (b) Write symbols for the following species: (i) 8 protons, 8 neutrons,
2. What are the oxidation numbers of the underlined elements in each of the following
1. Assign oxidation number to the underlined elements in each of the following species (a) NaH 2 PO 4 (b) NaHSO 4 (c) H 4_ P 2 O 7 (d) K 2 MnO 4 (e) CaO 2 (f) NaBH 4 (g) H 2 S 2 O 7 (h) KAl(SO 4 ) 2.12H
Lesson (1) Mole and chemical equation
Lesson (1) Mole and chemical equation 1 When oxygen gas reacts with magnesium, magnesium oxide is formed. Such Reactions are described by balanced equations known as "chemical equations" Δ 2Mg(s) + O2(g)