Q:

Which of the following is the cleanest source of energy?

A) Biofuel	B) Fossil fuel
C) Nuclear power	D) Wind energy

Answer & Explanation Answer: D) Wind energy

Explanation:

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Q:

Ozone hole is caused by chemicals like _____.

A) Nitrogen Oxide	B) Hydrogen Sulphide
C) Chloro Fluoro Carbon	D) Carbon Monoxide

Answer & Explanation Answer: C) Chloro Fluoro Carbon

Explanation:

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Q:

Friction is caused by the ______________ on the two surfaces in contact.

A) irregularities	B) smoothness
C) densities	D) gaps

Answer & Explanation Answer: A) irregularities

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Q:

A solar eclipse occurs when

A) moon comes in the middle of sun and earth	B) sun comes in the middle of moon and earth
C) earth comes in the middle of moon and sun	D) All of the above

Answer & Explanation Answer: A) moon comes in the middle of sun and earth

Explanation:

A solar eclipse happens when the moon gets in the way of the sun's light and casts its shadow on Earth. Solar eclipses happen when the New Moon comes between the Sun and Earth and blocks out the Sun's rays.

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Q:

What is the duration of the world’s shortest X–ray laser has been successfully created by the scientists?

A) 39 nanoseconds	B) 43 attoseconds
C) 15 picoseconds	D) 57 microseconds

Answer & Explanation Answer: B) 43 attoseconds

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Q:

The President can dismiss a member of the Council of Ministers

A) with the consent of the Speaker	B) only under emergency conditions
C) on the recommendation of the Prime Minister	D) on his own

Answer & Explanation Answer: C) on the recommendation of the Prime Minister

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Q:

What is the rank of India in the Doing Business Report 2020, after the recent update of the World Bank?

A) 63	B) 72
C) 56	D) 85

Answer & Explanation Answer: A) 63

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Q:

An incident ray strikes a plane mirror at an angle of 20 deg with the mirror. The angle between the incident ray and reflected ray is ____.

A) 140 deg	B) 40 deg
C) 50 deg	D) 20 deg

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