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Which one of the following noble gases i...

Which one of the following noble gases is not found in atmoshphere?

A

Rn

B

Kr

C

Ne

D

Ar

Text Solution

Verified by Experts

The correct Answer is:
A
Rn because it is radioactive element obtained by the disintegration of radium
`._(88)Ra^(206) to ._(86)Rn^(202) + ._(2)He^(4)`
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ERRORLESS -S AND P BLOCK ELEMENTS-Ordinary thinking (Nobal gases)
  1. Which of the following is most polarised

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  2. Who among the following firest prepared a stable compound of noble g...

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  3. Which one of the following noble gases is not found in atmoshphere?

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  4. Helium is added to the oxygen supply used by deep sea divers because

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  5. Fluorine forms chemical compounds with

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  6. Which element out of the He, Ar, Kr and Xe forms least number of compo...

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  7. The last member of the family of inert gases is

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  8. The forces acting between noble gas atoms are

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  9. Which of the following statements is not correct for a noble gas

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  10. Which of the following noble gases does not have an octer of electrons...

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  11. Gradual addition of electronic shells in the noble gases causes a decr...

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  12. XeF(6) on hydrolysis gives

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  13. The inert gas producing miximum number of compounds are

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  14. From the knowledge of the position of radium in the periodic table, wh...

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  15. Which of the following compound cannot be prepared ?

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  16. The lighest gas is

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  17. Which one of the following statements regarding helium is incorrect ?

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  18. Which one of the following reaction of xenon compounds is not Feasible...

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  19. The oxidation number of xenon in XeOF(2) is

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  20. Which of the following is planar?

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