set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Match the following columns ?

a) A - 3, B - 4, C - 2, D - 1

b) A - 2, B - 1, C - 3, D - 4

c) A - 2, B - 4, C - 3, D - 1

d) A - 3, B - 1, C - 2, D – 4

Question : 2

Filtration can be used to separate

a) liquids from liquids

b) liquids from solids

c) solids from solids

d) liquids from gases

Question : 3

Solubility is a good separation technique for

a) different salts

b) noble gases

c) pure metals

d) metallic alloys

Question : 4

Select the one that is a physical change.

a) Rusting of iron

b) Growth of plant

c) Digestion of food

d) None of these

Question : 5

The chemical name of 'Marsh gas' is

a) Propane

b) Ethene

c) Methane

d) Hexane

Question : 6

Which of the following is the best example of the law of conservation of mass?

a) A sample of air increases in volume when heated at constant pressure but mass remains unchanged

b) When 12 gm of carbon is heated in vacuum, there is no change in mass

c) Weight of platinum wire is the same before and after heating

d) 12 gm of carbon combines with 32 gm of oxygen to give 44 gm of carbondioxide.