Which of the following has zero valency?

  • A
    Sodium
  • B
    Beryllium
  • C
    Aluminium
  • D
    Krypton

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Similar Questions

Match List-$I$ with List-$II$ and select the correct answer using the codes given below the lists:
List-$I$ List-$II$
$(A) \ XeF_4$ $(1) \ \text{Distorted octahedral}$
$(B) \ XeF_6$ $(2) \ \text{Tetrahedral}$
$(C) \ XeO_3$ $(3) \ \text{Square planar}$
$(D) \ XeO_4$ $(4) \ \text{Pyramidal}$

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

The first compound of inert gases was prepared by scientist Neil Bartlett in $1962$. This compound is

In reaction $(1)$, $XeF_6$ undergoes complete hydrolysis to form $HF$ and $X$. In reaction $(2)$, $XeF_6$ undergoes partial hydrolysis to form $HF$, $Y$, and $Z$. The products $X, Y, Z$ respectively, are

Which of the following compounds is square planar?

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