Which of the following process / processes release heat ? (i) condensation (ii) vaporisation (iii) freezing (iv) melting
(a) only (i) (b) only (iv) (c) (i) and (iii) (d) (ii) and (iv)
i) .Condensation and iii).freezing give off heat option c is correct
Which of the following is (are) an endothermic process(es)?
(i) Dilution of sulphuric acid.
(ii) Sublimation of dry ice.
(iii) Condensation of water vapours.
(iv) Evaporation of water.
(a) (i) and (iii)
(b) (ii) only
(c) (iii) only
(d) (ii) and (iv)
If p = n(m+n)(m+n-1)m, which of the following are the factors of p (Given p,n,m are natural numbers).