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 Chemistry Questions

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Q:

Which metal is liquid at room temperature?

A) Bromine B) Chlorine
C) Mercury D) Cesium
 
Answer & Explanation Answer: C) Mercury

Explanation:

Mercury is the only metal that remains in liquid at room temperature.

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Q:

The chemical formula of Ammonia is _____ .

A) NH B) NH1
C) NH2 D) NH3
 
Answer & Explanation Answer: D) NH3

Explanation:
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Q:

Alkenes were earlier known as ______.

A) Paraffins B) Titoffins
C) Olefins D) Meloffins
 
Answer & Explanation Answer: C) Olefins

Explanation:
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Q:

Which one of the following is a physical change?

A) Burning of coal B) Burning of wood
C) Heating of a platinum crucible D) Heating of potassium chlorate
 
Answer & Explanation Answer: C) Heating of a platinum crucible

Explanation:

In Burning of coal, burning of wood and Heating of Potassium Chlorate there will be some sort of chemical change, but Heating of a Platinum crucible is a physical change.

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Q:

Potassium Permanganate is used for purifying drinking water, because________

A) It is a reducing agent B) It is an oxidising agent
C) It is a sterilising agent D) It dissolves the impurities of water
 
Answer & Explanation Answer: B) It is an oxidising agent

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Q:

Which one of the following forms of phosphorus is most reactive?

A) Black phosphorus B) White phosphorus
C) Violet phosphorus D) Red phosphorus
 
Answer & Explanation Answer: B) White phosphorus

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Q:

Which one of the following is an insulator?

A) copper B) wood
C) mercury D) aluminium
 
Answer & Explanation Answer: B) wood

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Q:

The mass of proton and mass of ________ is same.

A) Neutron B) Electron
C) Isoprone D) Alpha particle
 
Answer & Explanation Answer: A) Neutron

Explanation:
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