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Chemistry
An acidified solution of potassium dichromate is turned green when
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Q. An acidified solution of potassium dichromate is turned green when
Uttarkhand PMT
Uttarkhand PMT 2011
A
hydrogen gas is bubbled through it
B
air is passed through it
C
zinc pieces are added to it
D
zinc chloride is added to it
Solution:
Zinc pieces react with $H _{2} SO _{4}$ to give hydrogen in the nascent form. Nascent hydrogen readily turns $K_{2} C r_{2} O_{7}$ solution green.