About one-fifth of ordinary air is:

Important Questions on Air and Atmosphere

EASY

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 4

The component of air which is utilised by the plants in respiration is:

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 5

In an activity to show that air is mainly a mixture of two gases (nitrogen and oxygen), the carbon dioxide produced by the burning of candle in air is absorbed by dissolving a substance X in water in the trough. The substance X is :

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 6

Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 7

The constituent of polluted air which contributes in producing acid rain is:

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 8

Which of the following is not an air pollutant?

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 9

Which of the following will reach the Earth in greater amounts if the chlorofluorocarbons released into the air increase?

HARD

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 10

Which of the following is caused by global warming?

MEDIUM

6th ICSE

IMPORTANT

Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 11

Examples of suspended particulate matter are: