nature of matter and composition - Category wise Question and Answer Practice Test with Solutions

Question : 21 [UPPCS]

The chemical name of lime stone is

a) Calcium carbonate

b) Calcium chloride

c) Calcium oxide

d) Calcium

Question : 22

Distillation is a good separation technique for

a) solid alloys

b) liquids

c) solids

d) gases

Question : 23

Which one is a sublime substance?

a) Iodine

b) Table salt

c) Sugar

d) Potassium Iodide

Question : 24

Which one of the following will result in the formation of a mixture?

a) Adding sodium metal to water

b) Breaking of ice cubes into small pieces

c) Crushing of a marble tile into small particles

d) Adding milk in water

Question : 25 [CDS]

The main constituent of vinegar is

a) Citric acid

b) Acetic acid

c) Ascorbic acid

d) Tartaric acid