1.

A dark voilent solid X reacts with NH_(3) to form a mild explosive Y which decomposes to give a voilet coloured gas. X also reacts with H_(2) to give an acid Z. Z can also be prepared by heating its salt with H_(3) PO_(4) The dark violent solid X is

Answer»

`Cl_(2)`
`SO_(2)`
`Br_(2)`
`I_(2)`

Solution :`2NH_(3) + underset("(X)")(3I_(2)) RARR NI_(3). underset("(Y)")NH_(3)+3HI , underset("(X)")(I_(2)) + H_(2)rarr underset("(Z)")(2HI)`


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