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Barium sulphate on fusion charcoal and s...

Barium sulphate on fusion charcoal and sodium carbonate yields a compound `(X).(X)` on reaction with dilute HCl liberates a gas `(Y)`. The gas `(Y)` can be identified by `:`

A

Turns lead acetate paper black

B

Turns acidified potassium dichromate paper green

C

Burns with a blue flame

D

Smells like vinegar

Text Solution

Verified by Experts

The correct Answer is:
B
`Na_2 S + dil.2HCl to 2NaCl + H_(2)S`
`3H_(2)S + 4H_(2) SO_(4) + K_(2)Cr_(2)O_(7)overset("acidic")toK_(2)SO_(4) + underset("(green")(Cr(SO_(4))_(3)) + 3S + 7H_(2)O`
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