Q7 / 90 · JEE Main 2021 (26 Feb Shift 2) · Chemistry

$2, 4 - DNP$ test can be used to identify :

Correct answer
A
aldehyde
B
amine
C
halogens
D
ether

Solution

$2, 4 - DNP$ test is useful for the identification of carbonyl compounds.

The 2,4-dinitrophenylhydrazine can be used as a process for the identification of aldehydes and ketones.

The formed 2,4-dinitrophenylhydrazone is a solid that is purified and the melting point is determined. The comparison of a melting point with a table of known values could identify the compound as aldehyde or ketone

Hence, the correct answer is option: 'A'.

Relevant Questions

Given below are the four isomeric compounds Identify correct statements from below. A. and S will give precipitate with . B. P and Q will gi28 Jan, 2026 (M)Tests for aldehyde and ketones
Which of the following statements are TRUE about Haloform reaction?: A. Sodium hypochlorite reacts with KI to give KOI. B. KOI is a reducing23 Jan, 2026 (E)Tests for aldehyde and ketones
Iodoform test can differentiate between A. Methanol and Ethanol B. and C. Cyclohexene and cyclohexanone D. Diethyl ether and Pentan-3-one E.23 Jan, 2026 (E)Tests for aldehyde and ketones
Match the LIST-I with LIST-II \( {array}{|c|l|c|l|} & {List-I (Reagents)} & & {List-II (Name of reaction} \\ & & & {involving carbonyl compo22 Jan, 2026 (M)Tests for aldehyde and ketones
An organic compound " P " of molecular formula gives positive Iodoform test but negative Tollen's test. When " P " is treated with dilute ac21 Jan, 2026 (M)Tests for aldehyde and ketones
"P" is an optically active compound with molecular formula . When " P " is treated with 2,4-dinitrophenylhydrazine, it gives a positive test07 Apr, 2025 (E)Tests for aldehyde and ketones

2, 4-DNP test can be used to identify :

Solution

Relevant Questions

$2, 4 - DNP$ test can be used to identify :