CBSE Class 11-science Answered

(i)  Transverse, because the vibration of particles of the spring are at right angles to the direction of wave propagation.

(ii)  Longitudinal, because the molecules of the liquid vibrate to and fro about their mean positions along the direction propagation of the wave.

(iii)  Combination of transverse and longitudinal.

(iv)  Transverse, because the light waves are electromagnetic waves in which electric and magnetic fields oscillate in the direction at right angles to each other and also to the direction of propagation of the wave.

(v)  Longitudinal, because the direction of vibration of air molecules is to and fro about its mean position along the direction of propagation of wave due to the vibration of quartz crystal.