1. Tardigrade
  2. Question
  3. Chemistry
  4. <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

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Question

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

NTA AbhyasNTA Abhyas 2020Aldehydes Ketones and Carboxylic Acids

Solution:

Positive $2,4-DNP$ 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 $2,4-DNP$ and Fehling's test.