[MP PMT 2004]
A) $ PCl_3 $
B) $ BiCl_3 $
C) $ SbCl_3 $
D) $ CCl_4 $
Correct Answer: A
Because phosphorous is most electronegative element out of $ H_2SO_4+2HI\to \ 2H_2O+\underset{\text{Violet vapour}}{\mathop{I_2+SO_2\uparrow }} $ and C.
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