Question

Match the following columns (P) with (Q): 

	P		Q
a	Grignard reagent	i	AICl3,
b	Sandmeyer's reaction	ii	Sodium metal
c	Cannizzaro reaction	iii	Cu
d	Friedel-Crafts reaction	iv	CH3MgBr
e	Wurtz reaction	v	NaOH

• A. (a)-(iv); (b)-(iii); (c)-(ii); (d)-(i); (e)-(v)
• B. (a)-(v); (b)-(ii); (c)-(iii); (d)-(iv); (e)-(i)
• C. (a)-(iv); (b)-(i); (c)-(v); (d)-(iii); (e)-(ii)
• D. (a)-(ii); (b)-(iii); (c)-(i); (d)-(v); (e)-(iv)
• E. (a)-(iv); (b)-(iii); (c)-(v); (d)-(i); (e)-(ii)

Answer 1

Answer: (E)

a) Grignard reagent:

• Characteristic example: \( \text{CH}_3\text{MgBr} \)
• Matches with (iv)

 

b) Sandmeyer's reaction:

• Uses \( \text{Cu(I)} \) catalysts
• Matches with (iii)

 

c) Cannizzaro reaction:

• Base-catalyzed (\( \text{NaOH} \))
• Matches with (v)

 

d) Friedel-Crafts reaction:

• Uses \( \text{AlCl}_3 \) catalyst
• Matches with (i)

 

e) Wurtz reaction:

• Uses sodium metal
• Matches with (ii)

 

Correct Matching: a-(iv), b-(iii), c-(v), d-(i), e-(ii)

Thus, the correct option is (E): a) - (iv); b) - (iii); c) - (v); d) - (i); e) - (ii).

Answer 2

1. Analyze the reactions and reagents in Column (P):

We are tasked with matching each reaction or reagent in Column (P) with the appropriate substance or catalyst in Column (Q). Let us analyze each option step by step:

2. Match each item in Column (P) with Column (Q):

• a) Grignard reagent: Grignard reagents are organomagnesium halides, typically of the form \( RMgX \), where \( R \) is an alkyl or aryl group and \( X \) is a halogen. Example: \( CH_3MgBr \).
• b) Sandmeyer’s reaction: This reaction involves the conversion of aromatic diazonium salts into aryl halides using copper(I) ions (\( Cu(I) \)).
• c) Cannizzaro reaction: This is a disproportionation reaction of aldehydes (except formaldehyde) in the presence of a strong base, such as sodium hydroxide (\( NaOH \)).
• d) Friedel–Crafts reaction: This reaction introduces alkyl or acyl groups onto aromatic rings using a Lewis acid catalyst, such as aluminum chloride (\( AlCl_3 \)).
• e) Wurtz reaction: This reaction couples two alkyl halides to form a higher alkane, using metallic sodium (\( Na \)) as the reducing agent.

3. Assign matches based on the analysis:

• a) Grignard reagent → (iv) \( CH_3MgBr \)
• b) Sandmeyer’s reaction → (iii) \( Cu(I) \)
• c) Cannizzaro reaction → (v) \( NaOH \)
• d) Friedel–Crafts reaction → (i) \( AlCl_3 \)
• e) Wurtz reaction → (ii) Sodium metal

5. Final answer:

The correct option is (E).