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 $
