Q.

Which set of quantum number is not consistent with the quantum mechanical theory ?

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a

n=2, l=1,      m=1,   s=1/2

b

n=4, l=3,      m=2,   s=−1/2

c

n=3, l=2,      m=3,   s=+1/2

d

n=4, l=3,      m=3,   s=+1/2

answer is C.

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Detailed Solution

There is a well-defined co-relation between n, l, m and s quantum numbers in an atom. If n = n then l=n−1,  m  will  be  ±l  and s  will  always  be  ±1/2. For n = 3 there cannot be m = 3. Highest value m will be 2.
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