Question

Assertion :$p$-orbital is dumb-bell shaped. Reason: Electron present in $p$-orbital can have any one of the three values of magnetic quantum number, i.e., $0$, $+1$ or $-1$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Assertion
p-orbital is dumb-bell shaped.
s-orbital is spherical in shape.
The shape of a subshell is determined by the azimuthal quantum number $l$which represents the spatial distribution of the electron cloud around the nucleus.

Reason
Electron present in p-orbital can have any one of the three values of magnetic quantum number, i.e., 0, $+$1 or $-$1.
For p-orbital, $l=1$, hence, $m=-1,0,or+1$.
Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.