Question

Identify the correct statements about Z: 

I. \(Z\) is an aldehyde. 
II. \(Z\) undergoes Cannizzaro reaction. 
III. \(Z\) gives iodoform test. 
IV. \(Z\) does not give a test with Tollen's reagent.

• A. I and III
• B. II and IV
• C. I and IV
• D. II and III

Hint:

The diazotization reaction is commonly used to form diazonium salts, which can be further converted to phenols and aldehydes.

Answer 1

The Correct Option is A

- The reaction involves an amine (aniline) that undergoes diazotization with nitrous acid (NaNO\(_2\)/HCl) to form a diazonium salt (X). 
- In the presence of water, this intermediate undergoes hydrolysis to form a phenol (Y). 
- On heating with copper, the phenol undergoes oxidation to form an aldehyde (Z). 

Step 1: Aldehyde Formation The final product \(Z\) is an aldehyde, so statement I is correct. 

Step 2: Iodoform Test Aldehydes such as benzaldehyde give the iodoform test, confirming statement III. 

Step 3: Cannizzaro Reaction The Cannizzaro reaction occurs in non-enolizable aldehydes with no alpha-hydrogen, but \(Z\) is not such an aldehyde. Hence, statement II is incorrect. Hence, the correct answer is I and III.