1.

[Y is used infire works, safety matches] 'X' is

Answer»

`Br_(2)` and `Cl_(2)`<BR>`Cl_(2)`
`I_(2)`
`NO_(2)`

Solution :`UNDERSET("(X)")(3Cl_(2))+ 6KOH overset("hot")(rarr) 5KCl+ underset("(Y)")(KClO_(3)) + 3H_(2)O, KClO , KClO_(3) + overset("(Y)")(con. HCl) rarr`


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