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1. Write down the preparation, 2 properties and 2 uses for the following :- (a) Washing soda. (b) Baking soda. (c) Bleaching powder. (d) Plaster of paris.

2. Why does a transformer not work in DC?



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Hi students!

Washing soda: The soda, which is produced from common salt. It is obtained by heating sodium hydrogen carbonate where re-crystallization of sodium carbonate produces washing soda.

Baking soda: It is used in the kitchen for making delicious items. It is produced by using sodium chloride as one of the raw materials.

Bleaching powder: It is used for disinfecting water to make it free of germ. It is also used in the textile industry to produce cotton. 
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