Q:

There are two elements-calcium (atomic number 20) and argon (atomic number 18). The mass number of both the elements is 40. They are therefore known as

A) isotones	B) isochores
C) isobars	D) isotopes

Answer & Explanation Answer: C) isobars

Explanation:

Isotopes-These are atoms of the elements having the same atomic number but different mass number., Isobars-These are atoms of same mass number but different atomic number., Isotones-These are atoms of different elements having same number of neutrons.

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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) CH2ClF	B) C2H2
C) PF5	D) COCl2

Answer & Explanation Answer: A) CH2ClF

Explanation:

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Q:

Constantan is alloyed from ...... metals.

A) Ni, Ti, Fe, Cr	B) Cu, Ni, Mn
C) Ni, Cr, Mn, Fe	D) Cu, Ni

Answer & Explanation Answer: D) Cu, Ni

Explanation:

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Q:

Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?

A) Carbon dioxide	B) Oxygen
C) Carbon monoxide	D) Nitrogen

Answer & Explanation Answer: A) Carbon dioxide

Explanation:

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Q:

What is the ratio of masses of hydrogen and oxygen in the water?

A) 1 : 4	B) 1 : 8
C) 1 : 16	D) 1 : 64

Answer & Explanation Answer: B) 1 : 8

Explanation:

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Q:

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Jaded

A) Restorative	B) Thrilled
C) Gay	D) Tired

Answer & Explanation Answer: D) Tired

Explanation:

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Q:

A sentence with one blank is given, indicating that something has been omitted. Choose the word that best fits the blank appropriately.
You will have to undergo a _______ of tests before the interview.

A) Large	B) Series
C) Design	D) Booklet

Answer & Explanation Answer: B) Series

Explanation:

The trick here is to follow the structure of the statement. The blank is followed by 'of' and thus the blank will take a filler that can be followed grammatically by 'of' and also manages to give a proper meaning. On the basis of these filters, none of the options except option 2 makes any sense.

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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'.

The substitution of cream(A)/ instead of milk in the recipe (B)/makes for a rich dessert.(C)/No error(D)

A) A	B) B
C) C	D) D

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