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Question

Which of these is not a property of carbon dioxide?


A

Supports combustion

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B

Acidic in nature

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C

Colorless and odorless gas.

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D

Forms dry ice

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Solution

The correct option is A

Supports combustion


Explanation for correct option:

(A) Carbon dioxide is a non-combustible gas that does not favour combustion. It is for the same reason that carbon dioxide is used in fire extinguishers as it possesses the capability of replacing oxygen from the fire. When the supply of oxygen is cut, fire extinguishes because fire grows in the presence of oxygen.

Explanation for incorrect options:

(B) Carbon dioxide is acidic in nature because its reaction with bases results in the formation of salts and water. The salt formed here is in the form of carbonates. When further subjected to react with more carbon dioxide, the corresponding bicarbonates are formed.

(C) Carbon dioxide appears as a colourless gas and is odourless as well.

(D) Dry ice is another name for solid carbon dioxide.

Thus, option (A) is correct. Carbon dioxide does not support combustion.


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