Balwyn High School. Year 10 Science Exam Semester One, 2005.

Transcription

1 TIME INFORMTION Reading 11:10 Writing 11:20 Finish 12:35 Teacher Use Only Section /25 Section /50 Total /75 GRE alwyn High School. Year 10 Science Exam Semester One, Name: GR R LLE Teacher: MFL MQU RR lass: E F G H J K L M REING TIME: 10 mins EXM URTION: 75 mins (ESL: 90 mins) Instructions: 1. Write your name in the provided space above and in the space at the front of the second book. 2. ircle your teacher s initials above and in the space at the front of the second book.. 3. ircle your form above and in the space at the front of the second book.. 4. There are three (3) sections to the test in two books. a. Section is the multiple-choice section. Each question has one (1) answer only. Write all answers in the answer block in the answer page found at the start of the second book. Each question is worth 1 mark. b. Section is the short answer section. It is in the second book of the exam. Write the answers in the provided space below each question c. Section is not worth any marks. Only begin it if you have finished all other sections completely. d. ppendices include a periodic table and valency table of key ions and are in back of book 1. e. There are 75 marks and 75 minutes you should work at a mark per minute. 5. Good luck!

2 OOK 1: Section 1. Two atoms have the same atomic number but different mass numbers. The atoms are two different elements have different numbers of electrons have different numbers of protons are isotopes of the same element 2. n atom has 12 protons the atom is an alkaline earth metal the atom is an alkali metal the atom is a halogen the atom is a noble gas 3. neutral atom contains 13 electrons. It would be found in group V of the periodic table It would be found in the 13 th period of the periodic table It would most likely form a 3 - ion. It would be found in period 3 of the periodic table. 4. Two subatomic particles are found in the nucleus of an atom. They are: protons and electrons protons and isotopes neutrons and electrons protons and neutrons. 5. How many neutrons and electrons are present in a +2 particle, with atomic number of 18 and mass number of 38? 18 neutrons and 16 electrons 38 neutrons and 20 electrons 20 neutrons and 18 electrons 20 neutrons and 16 electrons

3 6. What is the maximum number of electrons that the p shell (sixth energy level) can accommodate? Which one of the following species has the greatest number of neutrons in its nucleus? 56 Mn Ni o Fe n ion has 12 protons and 10 electrons. The ion is: F 2- Mg 2- F 2+ Mg Which one of the following represents a cation? e - Mg 2+ l - H 10. Which one of the following correctly defines the mass number of a given atom? the total mass of neutrons and protons in the nucleus of the atom the total mass of neutrons and electrons in the atom the number of protons and electrons in the nucleus of the atom the total number of neutrons and protons in the nucleus of the atom

4 11. bromide ion is composed of 36 electrons, 35 protons and 44 neutrons. The ion is represented by the symbol: 44 r r r r How many neutrons in a Hydrogen atom ( 1 H)? None of these 13. Which one or more of the following pairs of elements react(s) to form a compound containing covalent bonds? potassium and fluorine hydrogen and oxygen oxygen and calcium arbon and chlorine 14. The electronic configuration of elements R, Q, P, S are: P 2,8,3 Q 2, 8, 8 R 2,6 S 2, 8, 18, 7 P & Q E P & R S & Q S & R R & Q

5 15. Which of the following formulas is incorrect? l 2 O 3 KHSO 4 Mg 3 (PO 4 ) 2 NaNO 3 16 Element X has an electronic configuration of 2,8,2. It is likely to form the compound: a 3 X 2 MgX XSO 4 X 2 (PO 4 ) Four sets of atoms and ions with formal charges are listed. Which set consists of atoms and ions, each with the same number of electrons in the outer shell?, F +, O, N -, 2- F +, N -, O, 2-, 3-3-, 2-, N -, O, F O -, 3-, F +, 2-, N n equation for the reaction when calcium metal and oxygen gas combine to form calcium oxide is s incorrectly as: 2a (s) + 2O (g) 2aO (s) This equation is not correct because: no charges have been shown on calcium and oxygen a is not the correct symbol for alcium metal O is not the correct formula for oxygen gas ao is not the correct formula for calcium oxide 19. onsider the following reaction: Lead Nitrate (aq) + Potassium iodide (aq) Lead Iodide (s) + Potassium Nitrate (aq) For this reaction, Lead Iodide is considered to be: precipitate n ion reactant Soluble

6 20. lassify the following substances, in order, as being either covalent or ionic compounds: Kl l 4 MgF 2 HF ionic ionic covalent ionic covalent covalent ionic covalent ionic covalent ionic covalent covalent ionic covalent ionic 21. The following equation represents the reaction of sodium carbonate with nitric acid: ana 2 O 3 + b HNO 3 c NaNO 3 + d H 2 O + e O 2 Which one of the following values of a, b, c, d and e make the above statement a balanced equation? a = 1, b = 1, c = 1, d = 1, and e = 1 a = 1, b = 2, c = 2, d = 1, and e = 1 a = 2, b = 1, c = 1, d = 2, and e = 2 a = 1, b = 1, c = 2, d = 1, and e = The electronic configurations of three elements are: X = (2, 6) Y = (2, 8, 2) Z = (2, 8, 5) Which two elements form covalent bonds with each other? X and Y X and Z Y and Z None of the above 23. n element which forms ionic compounds with chlorine of the form Xl would come from: Group I Group II Group VI Group VII 24. Which of the following is not true about ionic compounds? They are usually solids at room temperature They do not form molecules They usually dissolve in water Their aqueous solutions are generally poor conductors of electricity.

7 25. When Magnesium reacts with hydrochloric acid, the products are: a magnesium salt and oxygen gas a magnesium salt and hydrogen gas a magnesium salt and water magnesium salt, carbon dioxide and water E carbon dioxide and water 26. The speed of sound in air is 100 m/s 300 m/s 300 km/h km/h 287 The speed of radio waves in air is closest to 100 m/s 300 m/s 300 km/h km/h 28. Which of the following is not an example of electromagnetic radiation? Light Microwaves Sound Ultraviolet radiation E X-rays 29. Which of the following shows different types of waves in order of increasing frequency? M radio, FM radio, infra-red radiation, visible light, ultraviolet radiation, X-rays visible light, M radio, FM radio, infra-red radiation, X-rays, ultraviolet radiation microwaves, X-rays, FM radio, M radio, ultraviolet radiation, infra-red radiation gamma rays, X-rays, ultraviolet radiation, visible light, infra-red radiation, FM radio 30. Which has the greatest frequency? Radio waves X-rays Gamma rays Microwaves

8 31. Which of the following substances has the greatest mass? 2.5 mol of hydrogen gas, H mol of zinc, Zn 11.56g of calcium chloride, al Given that the symbol for iron ion is Fe 2+, and the formula for the phosphate ion is PO 3 4, the formula for iron(ii) phosphate is: FePO 4. Fe 3 (PO 4 ) 2. Fe 2 (PO 4 ) 3. Fe 3 PO Propane burns in air according to the equation: w H + xo yo + zh 3 8(g) 2(g) 2(g) 2O (g) The values of w, x, y and z needed (in order) to balance this equation are 1, 5, 3, 4. 1, 10, 3, 4. 2, 5, 6, 4. 1, 3, 3, Which of the following equations can be completed correctly by replacing X with 2H 2 O? NH 3(g) +2O 2(g) HNO 3(l) + X. 2Hl (aq) +MgO (s) Mgl 2(aq) + X. 2 4 H 10(g) +13O 2(g) 8O 2(g) + X. H 2 SO 4(aq) +a(oh) 2(aq) aso 4(s) + X. 35. One mole of O 2 does not contain vogadro s number of molecules. contain 6.02 x atoms. contain 3 x 6.02 x atoms. have a mass of 44 g. 36. The mass (in grams) of one mole iron (III) sulfate, Fe 2 (SO 4 ) 3, is closest to 100

9 Which of the following nitrogen compounds contains the largest percentage by mass of nitrogen? NO 2. NH 3. HNO 3. N 2 O 5.

10 OOK 1: ppendices TLE OF OMMON IONS Hydrogen Potassium Silver Sodium opperi mmonium Tin (I) Lithium arium alcium opper II Iron II Magnesium Lead Zinc Tin (II) luminium Iron (III) Tin (IV) Lead (IV) H + K + g + Na + u + NH 4 + Sn + Li + a 2+ a 2+ u 2+ Fe 2+ Mg 2+ Pb 2+ Zn 2+ Sn hloride Iodide Fluoride cetate Hydrogen arbonate Hydroxide Nitrate Permanganate Oxide Sulphide arbonate Sulphate l 3+ Fe Phosphate Nitride Sn Pb l - I - F - H 3 O 2 - HO 3 - OH - NO 3 - MnO 4 - O 2- S 2- O 3 2- SO 4 2- PO 4 3- N 3-1 PERIOI TLE OF THE ELEMENTS 1 H Li Na K Rb s Fr (223) 4 e Mg a Sr a Ra Sc Y La c Ti Zr Hf Rf (261) 23 V Nb Ta b (262) 24 r Mo W Sg (263) 25 Mn Tc (98) 75 Re h (262) 26 Fe Ru Os Hs (265) 27 o Rh Ir Mt (266) 28 Ni Pd Pt Uun (269) 29 u g u Uuu (272) 30 Zn d Hg Uub (277) l Ga In Tl Uut Si Ge Sn Pb Uuq (289) 7 N P s Sb i O S Se Te Po (209) 8 9 F l r I t (210) 2 He Ne r Kr Xe Rn (222) 58 e Th Pr Pa Nd U Pm (145) 93 Np Sm Pu (244) 63 Eu m (243) 64 Gd m (247) 65 Tb k (247) 66 y f (251) 67 Ho Es (252) 68 Er Fm (257) 69 Tm Md (258) 70 Yb No (259) 71 Lu Lr (260) N..: mass number in parentheses ( ) represents the most stable known isotope of that element.

11 OOK 2: Section : nswer Sheet. Name: GR R LLE Teacher: MFL SGR SM lass: E F G H J K L M Instructions: learly write all your answers for section in the following table. If there is no answer next to question number, no marks will be given even if an answer is circled in section. Q1 Q14 Q2 Q15 Q3 Q16 Q4 Q17 Q5 Q18 Q6 Q19 Q7 Q20 Q8 Q21 Q9 Q22 Q10 Q23 Q11 Q24 Q12 Q25 Q13

12 OOK 2: Section Question 1: onsider the following list of atomic species: 63 X, 35 X, 65 X, 65 X, 34 X, 37 X a) How many different elements are there? b) Which symbols represent isotopes of the same element c) Which have the same number of protons? d) Which have the same number of neutrons? Question 2: ompare the relative mass, charge and location of the 3 subatomic particles (protons, neutrons and electrons) by completing the following table. Relative mass Proton Neutron Electron harge Location Question 3: Name an element which has similar chemical properties to: a) calcium b) neon

13 Question 4: The elements, magnesium and calcium, behave similarly in chemical reactions. Give the electron arrangements of the atoms of both elements and explain how these electron arrangements may give some clue to the similarity in chemical behaviour of the two elements. Magnesium alcium Question 5: Use electron shell diagrams to determine the formula of the ionic compound formed between sodium (atomic number 11) and oxygen (atomic number 8) Question 6: Using the valency table provided, write the correct formula for each of the following: alcium carbonate Sodium sulfate Magnesium nitrate luminium oxide

14 Question 7: alance the following equations: a) KlO 3 K l + O 2 b) ZnO 3 + HNO 3 Zn(NO 3 ) 2 + O 2 + H 2 O c) Fe 2 O 3 + O Fe + O 2 Question 8: Write a balanced chemical equation, including the states, for each of the following: a) The heating of opper (II) carbonate produced opper (II) oxide and carbon dioxide b) Iron (III) chloride solution reacts with sodium carbonate solution to form the precipitate Iron (III) carbonate and sodium chloride solution. Question 9: sodium atom has 11 protons and 12 neutrons. a) What is its atomic number? b) How many electrons does a sodium atom have? c) what is the mass number of a sodium atom? Question 10: Write the chemical symbol for each of these elements: a) Hydrogen b) Sodium c) hlorine d) Fluorine e) Nitrogen f) Silicon

15 Question 11: What is similar about the outer shell of all elements in group I of the periodic table? Question 12: Electrons can move from one energy level (or shell) to a higher energy level. a) Explain how this can be made to happen to electrons in sodium atoms. b) What happens when the electrons return to the lower energy level? c) How can this process be useful in identifying different elements? Question 13: What feature of the atoms of the noble gases causes them to be so stable and unreactive? Question 14: Explain why carbon usually forms four covalent bonds. Question 15: How many atoms of hydrogen are present in each of the following formulas? (a) H 2 O 2 (b) (NH 4 ) 2 SO 4 (c) (NH 4 ) 2 HPO 4 Question 16: What is the molar mass of each of the following substances? (a) H 2 O 2 (b) (NH 4 ) 2 SO 4 (c) (NH 4 ) 2 HPO 4

16 Question 17: Write formulas for the following ionic compounds? (a) (b) (c) (d) (e) Mercury chloride luminium phosphate mmonium carbonate Potassium permanganate opper (II) oxide Question 18: alance the following equations: (a) l 2 + H 2 Hl (b) H 2 + O 2 H 2 O (c) ao + H 2 O a(oh) 2 (d) Mg + Hl Mgl 2 + H 2 (e) Fe + O 2 Fe 2 O 3 Question 19: The equation for the production of glucose by photosynthesis is: 6O 2 + 6H 2 O 6 H 12 O 6 + 6O 2 alculate the mass of carbon dioxide required to produce 36 grams of glucose.

17 Question 20: Using a periodic table, answer the following questions. a) What is the mass (in grams) of four moles of oxygen atoms? b) What is the mass (in grams) of one mole of sulfur atoms? c) What is the mass (in grams) of two moles of hydrogen atoms? d) What is the relative molecular mass of sulphuric acid (H 2 SO 4 )? e) If I have 147 grams of Sulphuric cid (H 2 SO 4 ), how many moles do I have? Question 21: Use the following word list to fill in the blank spaces in the paragraph below. You will not need to use all the words: Word list: metres longitudinal transverse distance disturbance sound amplitude trough torsional Mexican frequency ocean hertz seconds time wavelength medium peak light. wave is a periodic or vibration in a, such as water or air. The distance between the mean position of the wave and its highest point (the ) or lowest point (the ) is called the and is measured in metres. The number of waves which pass a point in one second is called the and is measured in. The period is the time it takes a single wavelength to pass a point and is measured in. The length of a single wave is called the and is measured in. There are two main types of waves. The first type of waves are called waves, which have the vibration parallel to the direction of travel of the wave. n example of this type of wave is a wave. The second type of waves are called waves, which have the vibration perpendicular to the direction of travel of the wave. n example of this type of wave is a wave.

18 Questions 22 to 25 refer to the following diagram. mplitude 2 m 1 m Time (s) m 2 m Question 22: What is the amplitude of the wave? Question 23: What is the frequency of the wave? Question 24: If the above wave has a wavelength of 12m, what is the speed at which the wave travels? Question 25: raw on the axes above a wave with twice the frequency and half the amplitude.

19 Question 26. What is the effective resistance for each of the following circuits? 4Ω 13Ω 12Ω 11Ω 5Ω 20Ω 20Ω 10Ω 10Ω 10Ω R R R R Question 27. What is the effective resistance for each of the following circuits? 4Ω 5Ω 3Ω 3Ω 6Ω 6Ω 8Ω 8Ω 2Ω 2Ω 5Ω 5Ω 16Ω 16Ω R R R R Question 28. Using an unlimited supply of 2Ω and 10Ω resistors, draw a circuit that has an effective resistance of (a) 12Ω (b) 11Ω (c) 15Ω (d) 8.33Ω

20 Question 29. alculate the resistance for the circuit above, when the voltage is 15V and the current is 2. Voltage 3 Resistor 2 Resistor urrent Question 2 Question 30: The graph above has the voltage current characteristics for resistor and resistor. Which resistor has the highest resistance, Resistor or Resistor? Justify your answer with a calculation.

21 OOK 2: Section : Timefiller. No marks!