State true or false.Following chemicals are used to carry out the following actions:1) To make drinking water free of germs -chlorine2) To make tasty, crispy pakoras in the kitchen - baking soda3) To remove the permanent hardness of water- Boiling4) To make toys and decorative materials- Plaster of Paris

A
True
B
False

Solution:

The given statement is true.
Concept- (i)Chlorine is used to disinfect water so that it is safe to consume.
(ii) A chemical compound with the formula is sodium bicarbonate (IUPAC name: sodium hydrogen carbonate). It is a salt made up of bicarbonate and sodium ions. The salt is known by various names, including baking soda, bread soda, cooking soda, and bicarbonate of soda, as a result of its long history and widespread use.
(iii) Calcium and magnesium ions are dissolved in hard water. These make it more challenging for the water and soap to create a lather. Dissolved calcium hydrogen carbonate leads to temporary hardness (which is removed by boiling). Dissolved calcium sulphate results in permanent hardness (which is not removed by boiling). Washing soda or an ion-exchange resin can be used to soften water.
iv) Plaster of Paris is used to create cosmetics, toys, and other decorative and inexpensive items.
Hence, the correct answer is option 1.

Solution:

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