If your unknown compound is water soluble but does not change the pH of the water,...
If your unknown compound is water soluble but does not change the pH of the water, has a peak at 1718 reciprocal centimeters, and tested positive for the 2,4-DNP test but negative for the Tollen's test, what derivative should be made for the compound?
3‚5-dinitrobenzoate derivative
2‚4-dinitrophenylhydrazone (2‚4-DNP) derivative
benzamide derivative
anilide (amide using aniline) derivative
Homework Answers
Answer: Tollens test and 2,4-DNP test is used to identify Aldehydes and ketone compounds.
2,4-DNP test is positive for both aldehydes and ketones.
Aldehydes are more reactive as compared to ketones, so they can be easily oxidised. So,Tollens test is easily shown positive by aldehydes as compared to ketones.
To identify the unknown compound, it is easy to make its hydrazone derivative by reacting the ketone with 2,4,-dinitrophenyl hydrazine .
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If your unknown compound is water soluble but does not change
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