ACSBR 20C Alkanes Alkenes - Assignment

Anglo-Chinese School (Barker Road) A Methodist Institution Founded in 1886 CHEMISTRY DEPARTMENT OF SCIENCE Name: ( ) Class: SEC 4 OC: ALKANES & ALKENES – ASSIGNMENT ALEX LEE/2010 PAGE 1 OF 6 PURE/COMBINED/N-LEVEL Multiple-Choice Questions [20 Marks] TOTAL SCORE / 30 Write in your selected answer for the multiple-choice questions in the boxes provided. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1. Which of the following compounds is unsaturated? A C B D 2. Which of the following best describes alkanes? A All molecules which are saturated hydrocarbons are alkanes. B All molecules which consist only of single bonds are alkanes. C All molecules which contain C–C bonds are alkanes. D All molecules which react with gaseous chlorine are alkanes. 3. Which of the following correctly describes saturated compounds? A All saturated compounds are hydrocarbons. B All saturated compounds are solid at room temperature. C All saturated compounds are unable to undergo addition reactions. D All saturated compounds only contain single bonds. 4. Which of the following compounds is able to undergo an addition reaction with chlorine? A C3H5COOH B C4H8Cl2 C C4H9OH D C5H12 C C O H H H O H C C O H H H H H H C C C H Cl H H H H H H H C C C H H H H H

ALEX LEE/2010 PAGE 2 OF 6 5. Gaseous samples of ethane and ethene can most easily be differentiated by A bubbling through aqueous bromine. B comparing their combustion products. C measuring their molar volume. D reacting with chlorine under ultra-violet light. 6. Which of the following equations does not represent an addition reaction? A C2H4 + Br2 ⎯→ C2H4Br2 B C3H6 + H2O ⎯→ C3H7OH C C4H7Cl + H2 ⎯→ C2H9Cl D CH2Br2 + Br2 ⎯→ CHBr3 + HBr 7. In the combustion of an alkane, which of the following may not be produced? A carbon monoxide C soot (carbon) B hydrogen D water vapour 8. During incomplete combustion, a yellow flame is formed due to the soot produced. Which of the following is unable to produce a yellow flame upon combustion? A carbon monoxide C propene B charcoal D propanoic acid 9. An alkane X undergoes catalytic cracking. Which of the following statements is false? A Carbon dioxide gas may be formed. B Hydrogen gas may be formed. C One of the products must be an alkane. D One of the products must be an alkene. 10. An experiment is set up as shown. What is the name of the reaction that takes place? A combustion B cracking C distillation D substitution heat gaseous hydrocarbons mineral wool soaked in paraffin broken porous pot water

ALEX LEE/2010 PAGE 3 OF 6 11. Three isomers are shown below. molecule A molecule B molecule C Which of the molecules may have been the product(s) of an addition reaction with gaseous chloride and the product(s) of a substitution reaction with gaseous chlorine respectively? produ