Question

MCQ7 (4 marks) Five statements are given below (i) f heat is supplied to ice at -10°C some ice always melts. (i) The heat evolved by steam at 110-C condensing to water at 100C is (mass) x (latent heat). (iii) If more heat than (mass) x (latent heat) is removed from ice at O'C the final temperature will be <oc (h) lf less heat than (mass) x (latent heat) is removed from ice at 0"C the final temperature will be> oC (If water at O'C is turned into ice at O'C the latent heat of fusion is absorbed by the ice/water. Which one of the following is completely correct? (A) )&(iv) (B) (il) only (C) (iii) & (v) (D) )and (v) (E) ()and (iv

Answer 1

Option C is correct i.e. (iii) and (v) statements are correct.

(iii) It is so because if more heat than mass × latent heat is removed , then temperature of ice falls below its melting point that is below 0 degree Celsius.

(V) water at 0 degree celsius can be converted into ice at 0 degree celsius only after water has absorbed the latent heat of fusion.