Q:

Molecular clocks are based on the idea that _____.

A) On average neutral mutations arise at a constant rate	B) Directional selection occurs at a constant rate
C) Mutations occur once every generation	D) Molecules resonate at a certain frequency that can be measured

Answer & Explanation Answer: C) Mutations occur once every generation

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Q:

What was the major decision that took place in 1987 Montreal Conference?

A) Developed countries will completely ban CFC production by 2000	B) Developed countries will completely ban CFC production by 2010
C) Developing countries will completely ban CFC production by 2000	D) Developing countries will completely ban CFC production by 2020

Answer & Explanation Answer: A) Developed countries will completely ban CFC production by 2000

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Q:

Which one of the followingis notan allotrope of carbon?

A) Coal	B) Diamond
C) Graphite	D) Graphene

Answer & Explanation Answer: A) Coal

Explanation:

Allotropy is the property of some chemical elements to exist in two or more different forms, or allotropes, when found in nature. There are several allotropes of carbon like diamond, graphite, graphene, fullerene, etc.Coal is not an allotrope of carbon because it is not 100% carbon. It contains lot of silica, sulphur and other compounds of carbon apart from carbon.

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Filed Under: Chemistry
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Q:

Which one of the following is not a borderline element?

A) Boron	B) Silicon
C) Polonium	D) Bismuth

Answer & Explanation Answer: D) Bismuth

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Q:

Japan is called the 'Land of the rising sun' because

A) Sun rises there as soon as it sets	B) Sun always remains in the eastern part of the sky throughout the day in Japan
C) Japan being the Eastern most country in the world, it has earliest sunrise	D) The rays of the sun get reflected from the waters of the sea and make the sunrise beautiful in Japan

Answer & Explanation Answer: C) Japan being the Eastern most country in the world, it has earliest sunrise

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Q:

Who has been appointed as the Secretary General of the United Nations in January, 2017?

A) Ban Ki-Moon	B) Kofi Annan
C) Boutros-Boutros Ghali	D) Antonio Guterres

Answer & Explanation Answer: D) Antonio Guterres

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Q:

The first Field Marshall of India was

A) A. S. Vaidya	B) K.M. Cariappa
C) Sunderji	D) S.H.F.J. Manekshaw

Answer & Explanation Answer: D) S.H.F.J. Manekshaw

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Q:

As of February 2018, who is the Indian-born CEO of the Nokia company?

A) Sundar Pichai	B) Ajaypal Singh Banga
C) Rajeev Suri	D) Satya Nadella

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