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When conc. H2 SO4 is added to dry KNO3 b...

When conc. `H_2 SO_4` is added to dry `KNO_3` brown fumes evolve. These fumes are of

A

`SO_(2)`

B

`SO_(3)`

C

`NO_(2)`

D

NO.

Text Solution

Verified by Experts

The correct Answer is:
C
`KNO_(3)+H_(2)SO_(4) overset(Delta) to KHSO_(4)+HNO_(3)`
`4HNO_(3) overset(Delta)to2H_(2)O +underset("Brown")(4NO_(2))+O_(2)`
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Knowledge Check

  • When conc. H_2SO_4 is added to dry KNO_3 brown fumes evolve. These are of

    A
    `SO_2`
    B
    `SO_3`
    C
    `NO_2`
    D
    NO

  • When concentrated H_(2)SO_(4) is added to dry KNO_(3) , brown fumes evolve. These fumes are

    A
    `SO_(2)`
    B
    `SO_(3)`
    C
    `NO`
    D
    `NO_(2)`

  • Conc. H_2 SO_4 is diluted

    A
    By adding water in `H_(2)SO_(4)`
    B
    By adding `H_(2)SO_(4)` in water
    C
    By adding glacial acid in `H_(2)SO_(4)`
    D
    None of the above

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