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An inorganic salt when heated with conce...

An inorganic salt when heated with concentrated `H_(2)SO_(4)` evolves a colourless pungent smelling gas but with concentrated `H_(2)SO_(4) " and" MnO_(2)`, evolves a cxoloured pungent smelling gas which bleaches moist litmus paper. The coloured gas is :

A

`NO_(2)`

B

`Cl_(2)`

C

`Br_(2)`

D

`l_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Cl^(-)+H_(2)SO_(4) to HCl uarr ("colourless") HSO_(4^(-))`
`MnO(OH)_(2)+2H_(2)SO_(4)+2Cl^(-) to Mn^(2+) +Cl_(2) uarr ("yellowish green")+2SO_(4)^(2-)+3H_(2)O`
`Cl_(2)+H_(2)O to 2HCl+[O]`
Litmus +[O] `to` colourless oxidised form
`Cl_(2)` is a yellowish green gas which bleaches litmus paper by oxidation.
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Knowledge Check

  • An inorganic salt when heated evolves colured gas which bleaches moist litmus paper. The evolved gas is :

    A
    `NO_(2)`
    B
    `SO_(2)`
    C
    `N_(2)O`
    D
    `I_(2)`

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    A
    only `CO_(2)`
    B
    only CO
    C
    a mixture of `CO and CO_(2)`
    D
    a mixture of `SO_(2) and CO_(2)`

  • An inorganic salt when heated evolves coloured gas which bleaches moist limus paper .The evolves gas is

    A
    `NO_(2)`
    B
    `SO_(2)`
    C
    `N_(2)O`
    D
    `I_(2)`

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