1.

(a) Give the main differences between physical changes and chemical changes. (b) Which of the following are chemical changes and which physical ? Give reason. (i) a glass bottle breaking (ii) coal burning in air (iii) making a cake (iv) wool being knitted into a sweater

Answer»

(a) Give the main differences between physical changes and chemical changes.

(b) Which of the following are chemical changes and which physical ? Give reason.

(i) a glass bottle breaking (ii) coal burning in air

(iii) making a cake (iv) wool being knitted into a sweater



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