Tag: solar energy

Questions Related to solar energy

Which of the following is formed under the earth by the decomposition of plant matter by anaerobic bacteria lying under water?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Coal gas

  2. Petroleum gas

  3. Natural gas

  4. Producer gas

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Correct Option: C

The source of energy which is different from others is

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Natural gas

  2. Petroleum

  3. Uranium

  4. Wood

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Correct Option: D

The amount of energy released in burning $1\ kg$ of coal is

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. $3\ MJ$

  2. $30\ MJ$

  3. $300\ MJ$

  4. $3000\ MJ$

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Correct Option: B
Explanation:

When $1\ kg$ of coal is burnt the energy released is $30\ MJ ( = 3\times 10^{7}J)$.

Fuel formed under the earths surface by the decomposition of organic matter is:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. organic fuel

  2. bio-gas

  3. fossil fuel

  4. underground fuel

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Correct Option: C
Explanation:

Fuels formed under the earth by the decomposition of organic matter are called fossil fuels

Which of the following is not a solid fuel?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Coke

  2. Coal

  3. Charcoal

  4. Kerosene

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Correct Option: D
Explanation:

Kerosene is a hydrocarbon liquid which is highly combustible. Also known as lamp oil it is used as fuel in industry as well as households.

What substance is obtained as a residue when wood is burned in a limited supply of air?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. water

  2. carbon dioxide

  3. methane

  4. charcoal

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Correct Option: D
Explanation:

Method used for the formation of charcoal is thermal pyrolysis.It is a processes involved in charring of wood.

The efficiency of traditional chulhas is:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. $8 - 10$%

  2. $12-14$ %

  3. $20-22$ %

  4. $25-27$ %

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Correct Option: A
Explanation:

The traditional chulha provides a low thermal efficiency. The efficiency of the traditional chulhas is usually around $8-10$%

Select the odd one out (kerosene, petrol, diesel, water)

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. water

  2. kerosene

  3. petrol

  4. diesel

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Correct Option: A
Explanation:

All are fuels except water

Firewood is a conventional source of energy. This statement is:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. True

  2. False

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Correct Option: A
Explanation:

Firewood is a conventional source which is non-renewable.

Conventional resources are:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Renewable

  2. Non-renewable

  3. Inexhaustible

  4. Clean

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Correct Option: B
Explanation:

Conventional resources are non-renewable resources. They cannot be replenished in foreseeable future.