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The entropy change लि a perfect gas is :

(வ) always positive

(8) a function of temperature only

(©) नपा

(D) a thermodynamic property depending upon temperature and pressure

Gibbs free energy G is given by :
(A) G=H+Tg B G=H/Tg രര ട്ട (D) G=H-Tg

There are a large number of particles each of mass 0.1 gm. All lying in a box at an equilibrium
temperature of 300 K. The probability that any one of them will fly to a height 1 A (Use MB
statistics) is <

(A) 0 B 1 (€) 1/2 (D) 1/4

The entropy change in 1000 gm water heated from 293 K to 353 K is (Sp. heat of water
4.2 [/ ‏ددع‎ - © :
(^) 7 (B) 0.782 J/K (© 227/௩ (D) 7820 J/K

If the ground state of chlorine is ४) then the number of substates associated when this
state splits in a weak magnetic field will be :
(A) One B) Two (©) Four (D) 50

The entity that must change during the course of molecular vibration for exhibiting Raman
effect is :

(ക) Frequency (8) Polarizability
(¢) Susceptibility (D) None of the above

A technique which is gaining recognition as a powerful accurate spectroscopic method
involving both the NMR and ESR processes is:

(A) Double resonance (8) Hyperfine splitting
(C) Isomer shift (D) Quadrupole 5711111೧

T the wavelength of sodium light is 5890 A and the number of oscillations corresponding to
coherence length is 50,000, then coherence length of the given light will be :

(A) 0.118A (8) 0.0509 ‏مه‎ (€) 0.169 Tm (D) 0.0295 m

A Wigner-Seitz primitive cell in the reciprocal lattice is called :

(ಗಿ) Bravais lattice (ए) Brillouin zone
(©) Structure factor (D) Miller indices
7 126/2014

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