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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Assuming the bond direction to the $z$ -axis, which of the overlapping of atomic  orbitals of two atom $(A)$ and $(B)$ will result in bonding?

$(I)\, s-$ orbital of $A$ and $P_x$ -orbital of $B$

$(II)\, s-$ orbital of $A$ and $P_z$ orbital of $B$

$(Ill)\, p_y$ -orbital of $A$ and $p_z$ orbital of $B$

$(IV)\, s-$ orbital of both $(A)$ and $(B)$

  • A
    $I$ and $IV$
  • B
    $I$ and $II$
  • C
    $III$ and $IV$
  • ✓
    $II$ and $IV$
✓

Answer

Correct option: D.
$II$ and $IV$
d
As $s$ is nondirectional so it will form bond in all directions.

Also $p _{ z }$ is directed on $z$-axis so it will form bond on $z$-axis.

So, $II$ and $IV$ are correct.

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