Which of the following is true about oxygen?

(a)

Completely burning gas

(b)

Partially burning gas

(c)

Doesn’t support burning

(d)

Supports burning

Aerated water contains

(a)

air

(b)

oxygen

(c)

carbon dioxide

(d)

nitrogen

Solvay process is a method to manufacture

(a)

lime water

(b)

aerated water

(c)

distilled water

(d)

sodium carbonate

Carbon dioxide with water changes

(a)

blue litmus to red

(b)

red litmus to blue

(c)

blue litmus to yellow

(d)

doesn’t react with litmus

Which of the following is known as azote?

(a)

Oxygen

(b)

Nitrogen

(c)

Sulpher

(d)

Carbon dioxide

______ is called as vital life

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Oxygen

Nitrogen is ________ than air.

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lighter

________ is used as a fertilizer.

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Nitrogen (Ammonia)

Dry ice is used as a _________.

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refrigerent

The process of conversion of iron into hydrated form of oxides is called ___________.

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rusting

Nitrogen

(1)

Fire extinguisher

Oxygen

(2)

Fertilizer

Carbon dioxide

(3)

Refrigerator

Dry ice

(4)

Respiration in living animals