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A dark brown solid (X) reacts with NH3 t...

A dark brown solid (X) reacts with `NH_3` to form a mild explosive which decompuses to give a violet coloured gas(X)also reacts with `H_2` to give an acid (Y). (Y) can also be prepared by heating its salt with `H_3 PO_4`.X and Y are

A

`Cl_2 ,HCl`

B

`SO_2 ,H_2 SO_4`

C

`Br_2 HBr`

D

`I_2 ,HI`

Text Solution

Verified by Experts

The correct Answer is:
D
`X=I_2 , Y =HI`
` 3I_2 + 2NH_3 to underset("(explosive)")(NH_3.Nl_3)`
` 8 NI_3 . NH_3 to 5 N_2 +I_2 + 6 NH_4 I`
` I_2 +H_2 to underset((Y))(6NH_4 I)`
` I_2 +H_2 to underset((Y))(2HI)`
` 3 Nal +H_3 PO_4 overset(Delta)to Na_3 PO_4 +3HI`
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