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Q:

Which of the following is not a Halon gas ?

A) methane B) Carbon tetra chloride
C) iodomethane D) bromomethane
 
Answer & Explanation Answer: A) methane

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Q:

Which of the following is usually not an air­pollutant?

A) Hydrocarbons B) Sulphur dioxide
C) Carbon dioxide D) Nitrous oxide
 
Answer & Explanation Answer: D) Nitrous oxide

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Q:

Which of these is not a macronutrient for Plants?

A) Nitrogen B) Phosphorus
C) Potassium D) Chlorine
 
Answer & Explanation Answer: D) Chlorine

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Q:

Which of the following are highly compressible?

A) Solid B) Liquid
C) Gas D) Solid and Liquid
 
Answer & Explanation Answer: C) Gas

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Q:

Which among the following is false about natural rubber?

A) It is an elastomer B) It is a monomer of cis­isoprene
C) Natural rubber is a polymer of chloroprene D) It is heated with sulphur compounds to improve its properties
 
Answer & Explanation Answer: B) It is a monomer of cis­isoprene

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Q:

The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

A) Vinegar B) Ash
C) Baking Soda D) Copper
 
Answer & Explanation Answer: D) Copper

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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 of the following elements has the lowest melting point?

A) Iron B) Nitrogen
C) Iodine D) Lead
 
Answer & Explanation Answer: B) Nitrogen

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