Chemistry Class 10th MCQs

The branch of Chemistry which deals with hydrocarbons:

1. Industrial chemistry
2. Inorganic chemistry
3. Organic chemistry
4. Physical chemistry

Cotton contains ______ cellulose:

1. 30%
2. 65%
3. 85%
4. 95%

Second highest layer of Earth's atmosphere is:

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere

Aeroplanes fly in:

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere

Atmospheric pressure decreases with the:

1. Increase in longitude
2. Decrease in altitude
3. Increase in altitude
4. Increase in latitude

Layer of atmosphere which separates stratosphere and troposphere is known as:

1. Tropo-pause
2. Mesopause
3. stratopause
4. Thermopause

Ozone layer is part of:

1. Mesosphere
2. Stratosphere
3. Thermosphere
4. Troposphere

Which is not part of greenhouse gases:

1. Carbon dioxide
2. Methane
3. Nitrous oxide
4. Oxygen

Second most abundant constituent of dry air in terms of volume after nitrogen is:

1. Nitrogen
2. Oxygen
3. Argon
4. Carbon Dioxide

Which of the following is the reason of global warming:

1. Presence of sulphite
2. Rise in CO2 concentration
3. Oxides of nitrogen
4. Formtion of ozone

The altitude on stratosphere is:

1. 40 to 45 km
2. 50 to 55 km
3. 60 to 65 km
4. 70 to 75 km