A wave going in a solid (a) must be longitudinal (b) may be longitudinal (c) must be transverse (d) may be transverse.

(a) Sublimation  (b) The amount of heat required to convert 1 kg of solid into liquid at one atmosphere pressure at its melting point is known as its latent heat of...

The given properties are the properties of a covalent or network solid. Therefore, the given solid is a covalent or network solid. Examples of such solids include diamond (C) and...

(B) reaction proceeds with fall in temperature Mixing of solid barium hydroxide [Ba(OH)2] and solid ammonium chloride [NH4Cl] in a ratio of 2 : 1 by weight at room temperature in...

It is a covalent solid such as SiO2, diamond, SiC, AlN, etc. Covalent solids (except graphite) have very high melting point and are insulators.

(a) must be longitudinal EXPLANATION:   Only a longitudinal wave can move in a gas because the particles of the gas are not close enough to allow a transverse wave.

(a) longitudinal stationary waves EXPLANATION:  An organ pipe open at both ends contains sound waves which are longitudinal waves, so the option (c) and (d) are not true. When the waves enter...

(d) Polarization. EXPLANATION:    The reflection, interference and diffraction effects are shown by both transverse and longitudinal waves. But polarization is only possible with a transverse wave because the transverse displacement of...

(a) towards the proton beam

(a) An electromagnetic wave going through vacuum is described by E0k = B0ω. 

(c) An electromagnetic wave going through vacuum is described by  k/ω