NABTEB PHYSICS
1-10: ADBADACDDD
11-20: AAACBCBADC
21-30: DCCDBBCADA
31-40: ABABCDAADA
41-50: AABABABABB

Call 08135727659

(2ai)
latent heat of fusion can be defined as a substance of a quantity of heat q required change a unit mass m of the substance at its melting point to a liquid without a change in temperature.

(2aii)
latent heat of vapourization is a substance which it's quantity of heat q required to change a unit mass (m) of the substance from liquid at its boiling point to vapour without a corresponding change in temperature.