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Q.

Which of the following is not a property of ethanol?

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a

Ethanol shows no effect on litmus paper

b

Ethanol gives a positive ${NaHCO}_{3}$ test

c

Ethanol is a liquid at room temperature

d

It has a pleasant odour

answer is C.

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Detailed Solution

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Ethanol is alcohol with the molecular formula $C_{2} H_{5} OH .$ It exists as liquid in room temperature. It is neutral by nature and hence shows no effect on litmus paper.

The ${NaHCO}_{3}$ or the sodium bicarbonate test is a test for acids. Ethanoic acid exhibits effervescence in the presence of sodium bicarbonate which proves its acidic nature. Ethanol shows no effervescence in the presence of sodium bicarbonate. This test is used to prove the neutrality of alcohol.

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