Question:
In the given reaction sequence involving \(CHCl_3\), the end product \(C\) is used as:
In the given reaction sequence involving \(CHCl_3\), the end product \(C\) is used as:
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Chloral hydrate (\(CCl_3CH(OH)_2\)) is a hypnotic (sedative) drug used to induce sleep.
Updated On: Apr 16, 2026
- explosive
- hypnotic
- tear gas
- analgesic
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The Correct Option is B
Solution and Explanation
Concept:
The reaction sequence (presumably \(CHCl_3 \xrightarrow{OH^-} \text{chloral} \xrightarrow{H_2O} \text{chloral hydrate}\)) ultimately forms chloral hydrate.
Step 1: Reaction pathway. \(CHCl_3\) (chloroform) reacts with a base (like \(OH^-\)) to form dichlorocarbene (\(:CCl_2\)), which can undergo further reactions. A common sequence is: \[ CHCl_3 \xrightarrow{OH^-} \text{chloral (CCl}_3CHO) \xrightarrow{H_2O} \text{chloral hydrate (CCl}_3CH(OH)_2) \]
Step 2: Identify the end product \(C\). The end product \(C\) is chloral hydrate (trichloroacetaldehyde hydrate).
Step 3: Use of chloral hydrate. Chloral hydrate is a sedative and hypnotic drug. It was historically used as a sleeping aid (hypnotic) and to relieve anxiety.
Step 4: Why not other options?
• (A) Explosive — chloral hydrate is not an explosive.
• (C) Tear gas — tear gases are compounds like chloroacetophenone (CN) or CS gas, not chloral hydrate.
• (D) Analgesic — analgesics are pain relievers (e.g., aspirin, paracetamol); chloral hydrate is a sedative/hypnotic, not primarily an analgesic.
Step 1: Reaction pathway. \(CHCl_3\) (chloroform) reacts with a base (like \(OH^-\)) to form dichlorocarbene (\(:CCl_2\)), which can undergo further reactions. A common sequence is: \[ CHCl_3 \xrightarrow{OH^-} \text{chloral (CCl}_3CHO) \xrightarrow{H_2O} \text{chloral hydrate (CCl}_3CH(OH)_2) \]
Step 2: Identify the end product \(C\). The end product \(C\) is chloral hydrate (trichloroacetaldehyde hydrate).
Step 3: Use of chloral hydrate. Chloral hydrate is a sedative and hypnotic drug. It was historically used as a sleeping aid (hypnotic) and to relieve anxiety.
Step 4: Why not other options?
• (A) Explosive — chloral hydrate is not an explosive.
• (C) Tear gas — tear gases are compounds like chloroacetophenone (CN) or CS gas, not chloral hydrate.
• (D) Analgesic — analgesics are pain relievers (e.g., aspirin, paracetamol); chloral hydrate is a sedative/hypnotic, not primarily an analgesic.
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