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Question

aK2Cr2O7+bKCl+cH2SO4xCrO2Cl2+yKHSO4+zH2O
Find the value of a,b,c,x,y, and z.

A
a=2,b=4,c=6,x=2,y=6,z=3
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B
a=4,b=2,c=6,x=6,y=2,z=3
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C
a=6,b=4,c=2,x=6,y=3,z=w
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D
a=1,b=4,c=6,x=2,y=6,z=3
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Solution

The correct option is B a=1,b=4,c=6,x=2,y=6,z=3
This reaction is actually the "Chromyl Chloride Test".

K2Cr2O7+4HCl+6H2SO42,CrO2Cl2+6KHSO4+3H2O
(This reaction should be remembered )

When K2Cr2O7 is heated with con HCl or with Chloride in presence of H2SO4 then red brown vapourd of CrO2Cl2 is evolved. If is used for detection of Chloride ions in qualitative analysis.

Correct answer:
(D) a=1, b=4, c=6, x=2, y=6, z=3

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