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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
    • DINESH PUBLICATION-THE NITROGEN FAMILY-Revision question
    1. When conc. H2 SO4 is added to dry KNO3 brown fumes evolve. These fumes...

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    2. Which of the following is a tetrabasic acid?

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    3. Phosphine is prepared by the action of

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    4. Which one of the followig elements occur free in nature?

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    5. The most stable hydride is

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    6. Which of the following substances is used as fertilizer?

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    7. Phosphide ion has the electronic structure similar to that of

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    8. BiCl3 on hydrolysis forms a white precipitate of .

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    9. Which one of the following compounds does not exist?

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    10. Metaphosphoric acid has the formula

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    11. Each of the following is true for white and red phosphorus except that...

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    12. When orthophosphoric acid is heated to 600^(@)C the product formed is

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    13. Phosphine is not obtained by the reaction when

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    14. White P when boiled with strong solution of caustic soda produces

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    15. Red P can be obtained from white P by

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    16. Which of the following oxides will be the least acidic?

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    17. In P4 O6, the number of oxygen atoms bonded to each phosphorus atom is

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    18. With respect to protonic acids, which of the following statements is c...

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    19. When AgNO3 is heated strongly the products formed are

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    20. The P-P-P bond angle in white phosphorous is .

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