Half Book 2

1

Which polymerization process produces water as a by-product?

A Addition polymerization B Condensation polymerization C Free radical polymerization D Chain polymerization

2

Which of the following best describes polymers?

A Low molecular weight compounds B Simple salts C Long-chain molecules D Metal alloys

3

Dehydrohalogenation of halogenoalkanes produces:

A Alkanes B Alkenes C Alcohols D Ketones

4

Which salt is commonly used in food?

A Sodium carbonate B Sodium chloride C Calcium sulphate D Ammonium nitrate

5

Which lipid forms cell membranes?

A Triglycerides B Steroids C Phospholipids D Waxes

6

Which functional group is responsible for acidity in carboxylic acids?

A –OH B –CO C –COOH D –CHO

7

Which enzyme breaks down starch into maltose?

A Lipase B Protease C Amylase D Pepsin

8

Chemical equilibrium can be achieved in:

A Open system only B Closed system only C Any system D Vacuum

9

Which polymer is used to make plastic bottles?

A PET B PVC C Nylon D Teflon

10

Which gas is released when carboxylic acid reacts with bicarbonate?

A Hydrogen B Oxygen C Carbon dioxide D Nitrogen

11

General formula of alkynes is:

A CnH2n+2 B CnH2n C CnH2n-2 D CnHn

12

What type of fuel are alcohols considered?

A Solid fuel B Liquid fuel C Gaseous fuel D Nuclear fuel

13

What is the general formula of carboxylic acids?

A CnH2n+1OH B CnH2n C CnH2n+1COOH D CnH2n-1COOH

14

Which process involves breakdown of complex molecules?

A Anabolism B Metabolism C Catabolism D Photosynthesis

15

Which property makes esters suitable for perfumes?

A High acidity B Pleasant smell C High reactivity D Strong basicity

16

Alcohol production by fermentation is considered:

A Chemical process only B Biological process C Physical process D Nuclear process

17

Carboxylic acids are used in food industry as:

A Sweeteners B Preservatives C Coloring agents D Oxidizing agents

18

Which suffix is used for alkenes?

A -ane B -yne C -ene D -oic

19

Which of the following is an example of condensation polymer?

A Polythene B PVC C Nylon-6,6 D Polystyrene

20

A solution with pH less than 7 is:

A Basic B Neutral C Acidic D Saline

21

What does a molecular formula show?

A Arrangement of atoms B Number of each type of atom C Shape of molecule D Type of bonds only

22

Which polymer is used in making insulation tapes?

A PVC B Nylon C Polystyrene D Rubber

23

Alcohols are good fuels because they:

A Produce smoke B Burn incompletely C Burn cleanly D Do not burn

24

Petroleum is a mixture of:

A Pure hydrocarbons B Single compound C Various hydrocarbons D Salts and acids

25

What is the molecular formula of ethene?

A C2H6 B C2H4 C C2H2 D C3H6