Sodium bicarbonate is useful as a fire extinguisher because A) It - TopicsExpress



          

Sodium bicarbonate is useful as a fire extinguisher because A) It serves as blanket for fire B) It releases water which extinguishes fire C) It emits a foam which extinguishes fire D) It decomposes on heating to give carbon dioxide 3. Which of the following types of glasses is/are used for making optical instruments; i. Flint glass, ii. Borosilicate glass, iii. Pyrex glass, iv. Soda glass A) i only B) i and ii C) i, ii and iii D) i, ii, iii and iv
Posted on: Sat, 05 Jul 2014 12:01:14 +0000

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