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\mathrm{K_2Cr_2O_7} reacts with \mathrm{NaCl} in acidic medium to give a viscous liquid which fumes in air. What is the compound?

Option: 1

\mathrm{CrO_3}


Option: 2

\mathrm{K_2CrO_4}


Option: 3

\mathrm{CrO_2Cl_2}


Option: 4

\mathrm{Cr_2OCl_2}


Answers (1)

best_answer

\mathrm{ K_2Cr_2O_7} reacts with \mathrm{NaCl} in acidic medium gives chromyl chloride which is red in colour. \mathrm{4NaCl + K_2Cr_2O_7 + 6H_2SO_4 \rightarrow 2KHSO_4 + 2CrO_2Cl_2 + 4NaHSO_4 + 3H_2O}

Hence option 3 is correct.

 

Posted by

HARSH KANKARIA

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