______ is the active component of air.

Fill in the Blanks

Oxygen is the active component of air.

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Chapter 4: Air - Evaluation [Page 55]

Chapter 4 Air
Evaluation | Q II. 1. | Page 55

Tick (√) the most appropriate answer.

The presence of water vapour in air is essential for :

Give a reason why water droplets appear on the outer surface of a tumbler containing ice.

State the utility of oxygen for respiration in living organisms

Complete the statement given below by filling in the blank with the correct word from the words given:

The product formed which is common to both combustion and respiration is ______.

Name the following:

The component of air which is present more in industrial areas.

Analogy

Photosynthesis : _____ :: Respiration : Oxygen

How do plants and animals maintain the balance of oxygen and carbon dioxide in the air?

Nitrogen is _______ than air.

Nitrogen is about two times more soluble in water than oxygen.

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.

Nitrogen