Which of the following noble gases is not present in the atmosphere?

  • A
    $He$
  • B
    $Ne$
  • C
    $Ar$
  • D
    $Rn$

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In the clathrates of $Xe$ with water,the nature of bonding between $Xe$ and water molecule is

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Which one of the following statements regarding helium is incorrect?

Assertion $(A)$: Noble gases have very low boiling points.
Reason $(R)$: All noble gases have general electronic configuration of $ns^2 np^6$ (except $He$).

$Xe + 2F_2 \xrightarrow[673 \ K, 5-6 \ bar]{Ni} ?$
Which compound is formed by the above reaction?

The structure of $XeOF_4$ is

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