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CBSE Class 12 · 2024 · Haloalkanes and HaloarenesMultiple Choice

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Auto-oxidation of chloroform in air and light produces a poisonous gas known as:
  1. (A)Phosphine
  2. (B)Mustard gas
  3. (C)Phosgene✓ Correct
  4. (D)Tear gas

Answer: (C)

Solution

In air and light chloroform is slowly oxidised to the highly poisonous carbonyl chloride (phosgene):

Correct option: (C). (This is why chloroform is stored in dark bottles filled to the brim.)

CBSE Class 12 Board · 2024 · Single correct option

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More board questions on Haloalkanes and Haloarenes

  1. Assertion (A): Inversion of configuration is observed in the S2 reaction.
    Reason (R): The reaction proceeds with the formation of a carbocation.
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  2. Account for the following:
    (a) Haloalkanes react with AgCN to form isocyanides as the main product.
    (b) Allyl chloride shows high reactivity towards the S1 reaction.
    (c) Haloarenes are extremely less reactive towards nucleophilic substitution reactions.
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  3. Write equations for the following:
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    b) reaction of chlorobenzene with CHCl / anhydrous AlCl
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  5. The substitution reaction of an alkyl halide mainly occurs by the SN1 or SN2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon-halogen bond is responsible for these substitution reactions. The rate of SN1 reactio …
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