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A dark violet solid X reacts with NH3 to...

A dark violet solid X reacts with `NH_3` to form a mild explosive which decomposes 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_3PO_4`. X and Y are :

A

`Cl_2,` `HCl`

B

`SO_2,` `H_2SO_4`

C

`Br_2,` `HBr`

D

`I_2,` `HI`

Text Solution

Verified by Experts

The correct Answer is:
D
The reaction involved are `3I_2 + 2NH_3 to NI_3. NH_3` (Explosive) + 3HI
`8NI_3. NH_3 overset("Decomposes")to5N_2 + underset("Violet gas")(9I_2uarr)+6NH_4I`
`I_2 + H_2 overset("Pt/710 K")to2HI`
`3NaI + H_3PO_4 to Na_3PO_4 + 3HI`
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