Half Book 1

1

Strength of solution changes with:

A Mass only B Volume only C Both mass and volume D Temperature only

2

Which salt is used in washing powders?

A Sodium carbonate B Potassium nitrate C Ammonium chloride D Copper sulfate

3

Which salt is prepared by reaction of metal with acid?

A Copper sulfate B Zinc sulfate C Sodium chloride D Calcium carbonate

4

Which of the following is NOT considered matter?

A Air B Water C Heat D Iron

5

In collision theory, proper orientation means:

A Particles must collide head-on B Particles must be parallel C Particles must collide randomly D Particles must have same mass

6

Which salt turns blue litmus red?

A Neutral salt B Basic salt C Acidic salt D Double salt

7

Which property is common in most salts?

A Liquid state B Low melting point C Crystalline solid D Gaseous nature

8

Which process is reversible?

A Burning of coal B Rusting C Melting of ice D Cooking food

9

Secondary cells are those which can be:

A Used once B Recharged C Discarded easily D Used only in labs

10

What is meant by the rate of a chemical reaction?

A Amount of catalyst used B Time taken for completion C Change in concentration per unit time D Temperature of reaction

11

Which factor does NOT affect the rate of reaction?

A Temperature B Pressure C Color of reactants D Concentration

12

Diffusion is the movement of particles from:

A Low concentration to high concentration B High concentration to low concentration C Solid to liquid D Liquid to solid

13

If percentage yield is 100%, it means:

A No reaction occurred B Actual yield is zero C Actual yield equals theoretical yield D Loss of product occurred

14

Which yield is used to measure efficiency of a reaction?

A Actual yield B Theoretical yield C Percentage yield D Limiting yield

15

If actual yield is less than theoretical yield, percentage yield will be:

A More than 100% B Equal to 100% C Less than 100% D Zero

16

Which salt is known as baking soda?

A Sodium carbonate B Sodium chloride C Sodium bicarbonate D Calcium hydroxide

17

In a dry cell, the electrolyte is:

A Liquid acid B Paste C Solid salt D Pure water

18

Dilution of a solution involves:

A Adding solute B Removing solute C Adding solvent D Heating solution

19

Which salt is formed when hydrochloric acid reacts with sodium hydroxide?

A Sodium sulfate B Sodium nitrate C Sodium chloride D Sodium carbonate

20

Robert Boyle is famous for:

A Periodic table B Boyle’s law C Atomic theory D Radioactivity

21

A battery is made up of:

A One cell B Two or more cells C Only electrodes D Only electrolyte

22

Which salt is formed from a strong acid and strong base?

A Acidic salt B Basic salt C Neutral salt D Double salt

23

Which salt is commonly insoluble?

A Nitrates B Sodium salts C Potassium salts D Silver salts

24

In electrolysis, reduction takes place at:

A Anode B Cathode C Electrolyte D Battery

25

Which law was proposed by Lavoisier?

A Law of multiple proportions B Law of conservation of mass C Law of definite proportions D Boyle’s law