Chemistry Revision Sheet Academic Year Second Term

Transcription

1 Chemistry Revision Sheet Academic Year Second Term Grade 10 Name: Date: Section: Q1: In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question. 1. All organic compounds contain a. sulfur. b. water. c. carbon. d. oxygen. 2. Structural isomers are compounds that have a. the same molecular formula but different structures. b. the same molecular formula and the same structure. c. different molecular formulas and different structures. d. different molecular formulas but the same structure. 3. Geometric isomers are compounds that have a. the same order of atom bonding and the same arrangement of atoms in space. b. a different order of atom bonding and a different arrangement of atoms in space. c. the same order of atom bonding and a different arrangement of atoms in space. d. a different order of atom bonding and the same arrangement of atoms in space. 1 P a g e

2 4. Which of the following compounds is not organic? a. CH4 b. CH3OCH3 c. CO d. BrC3H7 5. The ability of carbon to form long chains and rings of covalently bonded atoms is known as a. hybridization. b. catenation. c. saturation. d. isomerization. 6. The simplest organic compounds are known as a. functional compounds. b. structural isomers. c. monomers. d. hydrocarbons. 7. Which of the following indicates the number and types of atoms present in a molecule and shows the bonding arrangement of the atoms? a. molecular formula b. atomic formula c. chemical formula d. structural formula 8.How many different geometric isomers of 1,2-dichloroethene can there be? a. 1 b. 2 c. 3 d. 4 9.A geometric isomer with two alkyl groups on the same side of the carbon-carbon double bond is called a. cis. b. trans. c. di. d. mono. 2 P a g e

3 10.Another name for structural isomers is a. geometric isomers. b. polymers. c. functional isomers. d. constitutional isomers. 11. In a Stock system name, such as iron(iii) sulfate, the Roman numeral tells us a. how many atoms of Fe are in one formula unit. b. how many sulfate ions can be attached to the iron atom. c. the charge on each Fe ion. d. the total positive charge of the formula unit. 12. Changing a subscript in a correctly written chemical formula a. changes the number of moles represented by the formula. b. changes the charges on the other ions in the compound. c. changes the formula so that it no longer represents the compound it previously represented. d. has no effect on the formula. 13. Carbon atoms form bonds readily with atoms of a. elements other than carbon. b. both carbon and other elements. c. carbon only. d. only neutral elements. 14.Atoms have an oxidation number of zero in a(n) a.pure element. b.acid. c.ionic compound. d. molecular compound. Q.2 Answer the following questions in the space provided. 1. Name two types of carbon-containing molecules that are not organic. Carbonates( CaCO3, MgCO3) and oxides ( CO,CO2). 2. Explain why the following two molecules are not geometric isomers of one another. 3 P a g e

4 Because there is no double bond between carbon atoms so there will be free rotation around single bond. 3.In the space below, draw the structural formulas for two structural isomers with the same molecular formula. 4.In the space below, draw the structural formulas for two geometric isomers with the same molecular formula. 4 P a g e

5 5.Draw a structural formula that demonstrates the catenation of the methane molecule, CH4. 6.Draw the structural formulas for two structural isomers of C4H Draw the structural formula for the cis-isomer of C2H2Cl2. 5 P a g e

6 8. Draw the structural formula for the trans-isomer of C2H2Cl2. 9.How many atoms are present in each of these formula units? 11 a. Ca(HCO3)2 45 b. C12H22O11 10 c. Fe(ClO2)3 9 d. Fe(ClO3)2 N2O5 dinitrogen pentoxide? e. what is the formula for the compound Iron ( II) oxide f. What is the Stock system name for the compound FeO? 10.Write the formulas of the compounds formed by the following ions in the space provided. a. Ca 2+ and Cl CaCl2 b. Pb 2+ and CrO4-2 PbCrO4 c. Al 3+ and 2 SO 4 Al2(SO4)3 d. Sn 4+ and 3 PO 4 Sn3(PO4)4 e. Be +2 and SO4-2 BeSO4 6 P a g e

7 Q 3. Match the following. A Ans B 1. Ions formed from a single atom. h a. Oxyanions 2. Compounds made of two elements. g b. Organic compounds 3. Polyatomic ions that contain oxygen. a c. Catenation 4. Compounds containing carbon except carbonates and oxides. 5. A type of bonding of an element to itself to make chains and rings. 6. Compounds that have same molecular formula but different structures. b c d d. Isomers e. Has no exact meaning. f. Hydrocarbons 7. Oxidation number e g. Binary compounds 8. Compounds made of carbon and hydrogen only. f h. Monoatomic ion 7 P a g e