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STD 11 - 2. structure of atom — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 2. structure of atom4 Marks
MCQ
The quantum numbers $+1/2$ and $-1/2$ for the electron spin represent
  • A
    rotation of the electron in clockwise and anticlockwise derection respectively
  • B
    rotation of the electron in anticlockwise and clockwise direction respectively
  • C
    magnetic moment of the electron pointing up and down respectively
  • ✓
    two quantum mechanical spin states which have no classical analogue
✓

Answer

Correct option: D.
two quantum mechanical spin states which have no classical analogue
d
Just like the earth rotates around its axis, the electron spins about its axis either clockwise or anti-clockwise manner. The two types of rotation are $+\frac{1}{2}$ and $-\frac{1}{2}$. These two quantum mechanical spin states which have no classical analogue.

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