D-And F-Block Elements Ques 98

Question: $ 4K_2Cr_2O_7\xrightarrow{heat}4K_2CrO_4+3O_2+X $ . In the above reaction X is

[DCE 2004]

Options:

A) $ CrO_3 $

B) $ Cr_2O_7 $

C) $ Cr_2O_3 $

D) $ CrO_5 $

Show Answer

Answer:

Correct Answer: C

Solution:

Potassium dichromate, on heating gives oxygen and chromic oxide $ (Cr_2O_3) $ .

$ 4K_2Cr_2O_7\xrightarrow{\Delta }4K_2Cr_2O_4+3O_2+2Cr_2O_3 $



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