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2. structure of atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
Assertion : Spin quantum number can have two values, $+\frac{1}{2}$ and $-\frac{1}{2}$ .
Reason : $+$ and $-$ signs signify the positive and negative wave functions.
  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If the Assertion is correct but Reason is incorrect.
c
Plus and minus signs of spin quantum numbers imply that spin angular momentum
of the electron, a vector quantity, acts in the same or opposite directions of orbital angular momentum.

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