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 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



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