______ is the active component of air. - Science

______ 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 | Q II. 1. | Page 55

What is nitrogen-fixation?

Give reason:

When water is heated, we see bubbles rising up.

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

The diagrams below represents an experiment to show the presence of a component of air.

State why air is sucked from – outlet ‘B’ and not from outlet “A”
State why the air is sucked ‘slowly’ from the outlet “B”
State the observation seen after completion of the experiment.
State the reason for the above observation seen.
Name another component which if present in air as a pollutant would have given a similar observation

Give word equation for the following conversion:

Nitrogen dioxide to nitric acid

______ is the main component of air.

All living things use oxygen for breathing.

“Air is not an elementary substance, but a composition”. Why?

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

Carbon dioxide