1.

Write true or false for each statement : (a) The temperature of a substance remains unaffected during its change of state. (b) Ice melts at 100∘C. (c) Water at 100∘C. has more heat than steam at 100∘C. (d) Evaporation of a liquid causes cooling. (e) Water evaporates only at 100∘C. (f) Boiling takes place over the entire mass of the liquid. (g) Evaporation takes place over the entire mass of the liqid. (h) The process of a gas converting directly into solid is called vaporization. (i) At high altitudes, water boils above 100∘C. (j) The melting point of ice is 0∘C

Answer»

Write true or false for each statement :

(a) The temperature of a substance remains unaffected during its change of state.

(b) Ice melts at 100C.

(c) Water at 100C. has more heat than steam at 100C.

(d) Evaporation of a liquid causes cooling.

(e) Water evaporates only at 100C.

(f) Boiling takes place over the entire mass of the liquid.

(g) Evaporation takes place over the entire mass of the liqid.

(h) The process of a gas converting directly into solid is called vaporization.

(i) At high altitudes, water boils above 100C.

(j) The melting point of ice is 0C



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