How many among the following compounds will give the above result? i. Cyclohexanone ii. Acetone iii. Propionaldehyde iv. Acetophenone v. Acetaldehyde vi. Benzophenone vii. Benzaldehyde

Question

<img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/c-zo6dbxvdkqmn.png" /> How many among the following compounds will give the above result? i. Cyclohexanone ii. Acetone iii. Propionaldehyde iv. Acetophenone v. Acetaldehyde vi. Benzophenone vii. Benzaldehyde (A) 2 (B) 3 (C) 4 (D) 5

Tardigrade Admin · Accepted Answer

Positive 2,4-DNP test ⇒ Carbonyl group. Positive Fehling's test ⇒ Aliphatic aldehyde group. Aromatic aldehydes and ketones do not give Fehling's test. Hence, among the given options, compounds (iii) and (v) will give positive 2,4-DNP and Fehling's test.

Q.

How many among the following compounds will give the above result?

i. Cyclohexanone

ii. Acetone

iii. Propionaldehyde

iv. Acetophenone

v. Acetaldehyde

vi. Benzophenone

vii. Benzaldehyde

2

3

4

5

Positive $2, 4 - D NP$ test $\Rightarrow$ Carbonyl group. Positive Fehling's test $\Rightarrow$ Aliphatic aldehyde group. Aromatic aldehydes and ketones do not give Fehling's test. Hence, among the given options, compounds

(iii) and (v) will give positive $2, 4 - D NP$ and Fehling's test.

Q. How many among the following compounds will give the above result? i. Cyclohexanone ii. Acetone iii. Propionaldehyde iv. Acetophenone v. Acetaldehyde vi. Benzophenone vii. Benzaldehyde

2

3

4

5

Positive 2,4−DNP test ⇒ Carbonyl group. Positive Fehling's test ⇒ Aliphatic aldehyde group. Aromatic aldehydes and ketones do not give Fehling's test. Hence, among the given options, compounds (iii) and (v) will give positive 2,4−DNP and Fehling's test.

Q.

How many among the following compounds will give the above result?

i. Cyclohexanone

ii. Acetone

iii. Propionaldehyde

iv. Acetophenone

v. Acetaldehyde

vi. Benzophenone

vii. Benzaldehyde

Positive $2, 4 - D NP$ test $\Rightarrow$ Carbonyl group. Positive Fehling's test $\Rightarrow$ Aliphatic aldehyde group. Aromatic aldehydes and ketones do not give Fehling's test. Hence, among the given options, compounds

(iii) and (v) will give positive $2, 4 - D NP$ and Fehling's test.