Question

The quantum number symbols are given in List-I and the informations about them are given in List-II. The correct match is}

• A. I-d, II-a, III-c, IV-b
• B. I-c, II-d, III-a, IV-b
• C. I-b, II-c, III-d, IV-a
• D. I-c, II-a, III-d, IV-b
• E. I-b, II-d, III-a, IV-c

Hint:

Chemistry Tip: Remember order — $n$ size, $l$ shape, $m_l$ orientation, $m_s$ spin.

Answer 1

The Correct Option is B

Concept:
Each quantum number describes a different property of electron in an atom.
Step 1: Meaning of principal quantum number $n$.
$n$ tells the main shell and size (energy level) of orbital. So: $$n \rightarrow \text{Size of orbital}$$ Hence IV $\to$ b
Step 2: Meaning of azimuthal quantum number $l$.
$l$ determines subshell type ($s,p,d,f$) and orbital shape. So: $$l \rightarrow \text{Shape of orbital}$$ Hence III $\to$ a
Step 3: Meaning of magnetic quantum number $m_l$.
$m_l$ gives spatial orientation of orbital. So: $$m_l \rightarrow \text{Orientation of orbital}$$ Hence I $\to$ c
Step 4: Meaning of spin quantum number $m_s$.
$m_s$ gives spin direction of electron. So: $$m_s \rightarrow \text{Orientation of electron spin}$$ Hence II $\to$ d
Therefore correct matching is: $$\text{I-c,\ II-d,\ III-a,\ IV-b}$$ Hence correct option is (B). :contentReference[oaicite:0]{index=0}