1.

State whether the following statements are True or False:(i) Every year nearly 2,400 to 4,000 earthquakes occur on the earth.(ii) Potassium, sodium and calcium are the metals that react with water at high room temperature.(iii) A fire caused due to electrical components is extinguished by fire extinguishers like carbon dioxide are used.

Answer»

(i) False. (Every year nearly 12,400 to 14,000 earthquakes occur on the earth.)

(ii) False. (Potassium, sodium and calcium are the metals that react with water at normal room temperature.)

(iii) True.



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