Atomic structure.. Prev IIT ques

Q1. The spin quantum numbers +1/2 and -1/2 for the electron spin represent
(a) rotation of the electron in clockwise and anticlockwise direction respectively
(b) rotation of the electron in anticlockwise and clockwise direction respectively'
(c) Magnetic moment of the electron pointing up and down respectively
(d) Two quantum mechanical spin states which have no classical analogue

Q2. Rutherford's α scattering expt eventually led to the conclusion that
(a) mass and energy are related
(b) electrons occupy space around the nucleus
(c) neutrons are buried deep in nucleus
(d) point of impact with matter can be precisely determined

(although options make sure that (b) has to be ans as others wrong) but is (b) a conclusion of rutherford's model

Q3. Which of the following related to photons both as wave motion and as a stream of electrons?
(a) Interference
(b) E=mc²
(c) diffraction
(d) E=hν

Q4. A/R
Stmnt 1: Nucleide ³⁰Al₁₃ is less stable than ⁴⁰Ca₂₀
Stmnt 2: Nucleides having odd no of protons and neutrons are generally unstable