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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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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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