SOLIDS EXPAND ON HEATING BECAUSE (1)KINETIC ENERGY OF ATOM INCREASES (2)POTENTIAL ENERGY OF ATOM INCREASES (3)TOTAL ENERGY OF ATOM INCREASES (4)THE POTENTIAL ENERGY CURVE IS ASYMMETRIC ABOUT THE EQUILIBRIUM DISTANCE BETWEEN NEIGHBOURING ATOMS

Q. A solid expands upon heating because : (A) the potential energy of interaction between atoms in the solid is asymmetric about the equilbrium positions of atoms (B) the frequency of vibration of the atoms increases (C) the heating generates a thermal gradient between opposite sides (D) a fluid called the caloric flows into the interatomic spacing of the solid during heating thereby expanding it

Q. When a hydrogen atom is raised from the ground state to third state (1) Both kinetie energy and potential energy increases(2), Both kinetic energy and potential energy decreases (3) Potential energy increases and kinetic energy decreases (4) Potential energy decreases and kineltic energy increases

Q. As one considers orbits with higher values of n in a hydrogen atom, the electric potential energy of the atom

(a) decreases
(b) increases
(c) remains the same
(d) does not increase

Q. With increasing quantum number, energy difference between adjacent levels in atoms :