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Question

2 mL of ethanoic acid was taken in each of the 3 test tubes A, B and C. To these test tubes 2 mL, 4 mL and 8 mL of water was added respectively. Which test tube will give a clear solution?


A

Test tube A only

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B

Test tube B only

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C

Test tubes A and B only

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D

All three test tubes

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Solution

The correct option is D

All three test tubes


Ethanoic acid and water are miscible in all proportions. Ethanoic acid has a methyl group attached to the carboxylic group (COOH), and this polar carboxylic group interacts with polar water molecules. Hence, it's for this reason that ethanoic acid dissolves in any proportion in water.


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