JEE Previous Years Solutions

Q. The de Broglie wavelength of a proton and α-particle are equal. The ratio of their velocities is:

     (1) 4:2                        (2) 4:1                        (3) 1:4                          (4) 4:3

Q. On the basis of kinetic theory of gases, the gas exerts pressure because its molecules:

(1) suffer change in momentum when impinge on the walls of container.

(2) continuously stick to the walls of container.

(3) continuously lose their energy till it reaches wall.

(4) are attracted by the walls of container.