Question

Q.5 State whether the following statements are 'true' or 'false'.
If false write the correct statement.

1. The mesosphere in the atmosphere, contains most of the air, fit for respiration

2. The percentage of carbon dioxide in the air is - between 0.2 to 0.4%
%.

3. Carbon dioxide, water vapour and energy in the form of heat are evolved during
respiration.

4. Photosynthesis is a process by which green plants prepare their own food in the
presence of sunlight & chlorophyll.

5. Air is a mixture and not a compound since the components of air - cannot be separated
by physical methods.​

Answer 1

Explanation:

Solution:

False, The troposphere in the atmosphere, contains most of the air, fit for respiration.

True

True

True

False, air is a mixture and not a compound because its components can be separated by physical methods.

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