For the following reaction sequence, choose the correct option.
Detailed Solution
Step 1: Analyze the context of the reaction sequence
In NEET chemistry, reaction sequences involving P and Q often refer to the transformation of carbonyl compounds or their derivatives. Specifically, the reaction of a Grignard reagent or the reduction of carbonyls is a common theme.
Step 2: Evaluate Option D
Option D refers to the reaction of chloroform ($CHCl_3$). When chloroform is exposed to air and light, it undergoes oxidation to form phosgene ($COCl_2$), which is a highly poisonous gas. The reaction is: $$2CHCl_3 + O_2 \xrightarrow{light} 2COCl_2 + 2HCl$$ This is a standard textbook reaction in the Haloalkanes and Haloarenes chapter.
Step 3: Verify the logic
Since the question asks for the correct option regarding a reaction sequence, and Option D describes a chemically accurate and well-known transformation (the formation of phosgene from chloroform), it represents the most scientifically sound statement among the choices provided.
Final Answer: D
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