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B
Carbonyl tetrachloride
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C
Phosphoryl chloride
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D
Carbonyl trichloride
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Solution
The correct option is A Carbonyl dichloride Carbonyl dichloride is also known as phosgene gas. When chloroform reacts with oxygen in presence of light, phosgene gas is produced. The reaction is as follows: 2CHCl3+O2light→2COCl2+2HCl