GENERAL SCIENCE CLASS 8 MCQS

This is layer of atmospheric gas that absorbs harmful ultraviolet rays from Sun:

1. Ozone Layer
2. Troposphere
3. Stratosphere
4. Mesosphere

Ozone Layer restricts which one of the following:

1. Infrared Rays
2. Ultraviolet Rays
3. X-Rays
4. Gamma Rays

Which gas is emitted by incomplete combustion of fuel:

1. Carbon Dioxide
2. Carbon Monoxide
3. Nitrogen Oxide
4. Sulfur Dioxide

The poisonous gas which is the main byproduct of motor vehicle with irritating smell is:

1. Carbon Dioxide
2. Carbon Monoxide
3. Nitrogen Oxide
4. Sulfur Dioxide

The animal included in the endangered species is:

1. Lions
2. Giant pandas
3. Elephants
4. Kangaroos

The step which can save the earth and natural resources:

1. Burning of fossil fuels
2. Cut down more trees
3. Waste more water
4. Use recycled and reusable material

The permanent destruction of forests to make the land available for other uses is called:

1. Deforestation
2. Afforestation
3. Reforestation
4. Desertification

Which of the following equations represents a addition reaction:

1. AB → A+B
2. A → AB
3. A+B → AB
4. AB → A+C

A single compound breaks down to form two or more simpler substances are called:

1. Combination Reaction
2. Decomposition Reaction
3. Neutralization Reaction
4. Addition Reaction

The term acid comes from the Latin word:

1. Acere
2. Acidos
3. Acare
4. Acre