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About 78% of earth atmosphere contains, ...

About `78%` of earth atmosphere contains, ……………… .

A

P

B

As

C

N

D

Bi

Text Solution

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The correct Answer is:
C
N
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FULL MARKS-P - BLOCK ELEMENTS - II-Additional Questions (I. Choose the best answer.)
  1. About 78% of earth atmosphere contains, ……………… .

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  2. Which one of the following is not a pnictogens?

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  3. Which one of the following shows isotopes?

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  4. Nitrogen gas in atmosphere is separated industrially from liquid air ...

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  5. Bond order for nitrogen molecular is ………………. .

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  6. Nitrogen gas is, ……………….. .

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  7. Which one of the following is used is cryosurgery?

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  8. The dielectric constant of ammonia is (K ) …………….. .

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  9. When ammonia reacts with copper sulphate solution to give complex, the...

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  10. H-N-H bond angle in NH(3) is ……………. .

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  11. Shape of ammonia is ………………. .

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  12. Nitric acid prepared in large scales using, ……………… .

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  13. Benzene undergoes nitration reaction to form nitrobenzene in this reac...

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  14. Oxidation state of N in HNO(3) is ………………….. .

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  15. Compound used in photography is ………………… .

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  16. Sodium nitrate used in …………….. .

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  17. Nitrogen sesquoxide colour is ……………….. .

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  18. White phosphorous is also called as, ……………… .

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  19. White (yellow) phosphorous glows in the dark due to oxidation which is...

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  20. Yellow phsophorus reats alkali on boiling in an inert atmosphere libe...

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