Q:

The main constituent of biogas is

A) Butane	B) Methane
C) Hydrogen Sulphide	D) Carbondioxide

Answer & Explanation Answer: B) Methane

Explanation:

The main constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.

Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion.

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Q:

Fish and other aquatic creatures can live inside a deep frozen pond because

A) fish are cold-blooded animals	B) ice is a bad conductor of heat
C) there will always be water just beneath the ice level	D) they can adapt themselves to live in ice

Answer & Explanation Answer: C) there will always be water just beneath the ice level

Explanation:

Water has the maximum density at $4^{o} C$ . So at this temperature, it sinks down to bottom and stays here. If it cools further, it will become less dense and move up. So while the upper layers can cool enough to form ice, the bottom layers remain as water at $4^{o} C$ .

Therefore, (C) is correct.

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Q:

Water has maximum density at............

A) 0 C	B) -15 C
C) 4 C	D) 15 C

Answer & Explanation Answer: C) 4 C

Explanation:

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Q:

DRDO full form is

A) Delhi Research and Development Organisation	B) Defence Research and Deployment
C) Delhi Rail Development Organisation	D) Defence Research and Development Organisation

Answer & Explanation Answer: D) Defence Research and Development Organisation

Explanation:

DRDO stands for The Defence Research and Development Organisation.

The Defence Research and Development Organisation (DRDO) is an agency of the Republic of India, charged with the military's research and development, headquartered in New Delhi, India.

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Q:

Heavy water is

A) PH7	B) rain water
C) deuterium oxide	D) tritium oxide

Answer & Explanation Answer: C) deuterium oxide

Explanation:

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Q:

The fastest growing plant is ______ ?

A) Ashoka	B) Banyan
C) Eucalyptus	D) Rose

Answer & Explanation Answer: C) Eucalyptus

Explanation:

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Q:

Fifth generation computer is also known as

A) Very Large Scale Integration (VLSI)	B) Knowledge information processing system
C) Both A & B	D) None of the above

Answer & Explanation Answer: B) Knowledge information processing system

Explanation:

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Q:

Which of the following lake lies on the Equator in Africa continent?

A) Tanganyika	B) Victoria
C) Nyasa lake	D) Lake Kariba

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