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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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Q:

Which one of the following is not a borderline element?

A) Boron B) Silicon
C) Polonium D) Bismuth
 
Answer & Explanation Answer: D) Bismuth

Explanation:
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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No error'.
Myself and Roshni (1)/ will take care of (2)/ the event on Sunday. (3)/ No Error (4)

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: A) 1

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Q:

Which of the following vitamins help in the absorption of calcium?

A) Vitamin A B) Vitamin D
C) Vitamin B D) Vitamin C
 
Answer & Explanation Answer: B) Vitamin D

Explanation:
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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:

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.

An act when people vote in order to make a decision about a particular subject or policy rather than voting for a person

A) Election B) Exit­poll
C) By­-election D) Referendum
 
Answer & Explanation Answer: D) Referendum

Explanation:
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Q:

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.
Learn by heart

A) To memorize something B) Love something terribly
C) Learn a lesson by making a mistake D) Learn to control or hide your true feelings
 
Answer & Explanation Answer: A) To memorize something

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

 

You have been working very hard (A)/ for the past two years.(B)/ isn't it? (C)/ No Error (D)

A) A B) B
C) C D) D
 
Answer & Explanation Answer: C) C

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