Q:

The depletion in Ozone layer is caused by ___________ .

A) Nitrous oxide	B) Carbon dioxide
C) Chlorofluorocarbons	D) Methane

Answer & Explanation Answer: C) Chlorofluorocarbons

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Q:

Pentane has _____ structural isomers.

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: C) 3

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Q:

Which one of the following is a cation?

A) Carbonate	B) Nitrate
C) Ammonium	D) Hydroxide

Answer & Explanation Answer: C) Ammonium

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Q:

......... is a deliquescent compound.

A) Quick lime	B) Sulphuric acid
C) Phosphorous pentoxide	D) Magnesium chloride

Answer & Explanation Answer: D) Magnesium chloride

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Q:

Which among the following is used to generate light, to weld metals?

A) Ethylene	B) Acetylene
C) Glycol	D) Oxalic acid

Answer & Explanation Answer: B) Acetylene

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Q:

Which of the following gases is known as "Laughing Gas"?

A) Nitrous oxide	B) Nitrogen peroxide
C) Nitrogen	D) Nitric oxide

Answer & Explanation Answer: A) Nitrous oxide

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Q:

Which of the following elements has the lowest melting point?

A) Helium	B) Potassium
C) Tungsten	D) Sulphur

Answer & Explanation Answer: A) Helium

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Q:

Which among the following is not a direct tax?

A) Income tax	B) Wealth tax
C) Corporate tax	D) None of these

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