1.

An inorganic salt when heated evolves a coloured gas which bleaches moist litmus paper. The evolved gas is

Answer»

`NO_(2)`
`Cl_(2)`
`Br_(2)`
`I_(2)`

SOLUTION :`Cl_(2)` isa greenish YELLOW gas which BLEACHES LITMUS paper by oxidaiton
`Cl_(2)+H_(2)O to 2HCl +[O]`
Litmus +[O] `to` colourless oxidised from


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