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Organic compound Positive test
I $C_{6} H_{5} C H O$ A 2,4 – DNP, Tollen’s, Fehling ‘s but not Iodoform
II $C H_{3} - C O - C H_{3}$ B 2,4-DNP,Haloform but not Tollen’s
III $C H_{3} - C H O$ C 2,4-DNP, Tollen’s but not Fehling’s
IV $H C H O$ D 2,4-DNP,Fehling’s and Iodoform
Correct match is
I II III IV
1 A B C D
2 C B D A
3 C B A A
4 A B D C

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answer is B.

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Detailed Solution

I) Ketones do not give positive Tollen’s and Fehling’s test.
II) Aromatic aldehydes do not give positive Fehling’s test
III) HCHO does not give positive haloform test

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