RRB GROUP D Chemistry Quiz - 30

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Question 1:

Which of the following is not the green house gas ?

Carbon dioxide

Ozone

Water vapours

Chlorine gas

Refrigerator helps in food preservation by

Killing the germs

Sealing the food with the layer of ice

Destroying viral action

Reducing the rate of biochemical reactions

The presence of sulphur in gun powder -

Increase the ignition temperature

Decrease the ignition temperature

Makes the powder smokeless

Increase explosiveness of the gun powder

Surface tension of a liquid decreases with

Which of the following statement is correct ?

Both 1 and 3

Both 1 and 2

1,2,3

Only 2

Bleaching action of chlorine is due to which reaction ?

Hydrolysis

Oxidation

Redox

Decomposition