1.

Fill in the blanks: (a) The substances which undergo chemical change are called................(b) The substances formed as a result of a chemical reaction are called..................(c) During a chemical reaction transfer of................ takes place. (d) The basic conditions necessary for a chemical reaction is..................(e) In some chemical reactions an insoluble................ is formed when two solutions are mixed.

Answer»

(a) The substances which undergo chemical change are called reactants. 

(b) The substances formed as a result of a chemical reaction are called products. 

(c) During a chemical reaction transfer of energy takes place. 

(d) The basic conditions necessary for a chemical reaction is close contact. 

(e) In some chemical reactions, an insoluble precipitate is formed when two solutions are mixed.



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