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In this sequence X, Y , Z are respective...

In this sequence X, Y , Z are respectively:

A

Acidified `H_(2)O_(2)`, alkaline `H_(2)O_(2),` acidified `H_(2)O_(2)`

B

Alkaline `H_(2)O_(2)`, acidified `H_(2)O_(2),` Zn/HCl

C

Acifidied `H_(2)O_(2)`, Heat, alkaline `H_(2)O_(2)`

D

Alkaline `H_(2)O_(2),` acidified `H_(2)O_(2)`, on standing

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The correct Answer is:
D
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