Q11 of 48 Page 9

Common salt besides being used in kitchen can also be used as the raw material for making

(i) Washing soda


(ii) bleaching soda


(iii) Baking soda


(iv) slaked lime

Common salt (NaCl) is formed by reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH). It serves as an important raw material for the production of various chemical compounds such as caustic soda (sodium hydroxide), washing soda (sodium carbonate), baking soda (sodium bicarbonate) used in various industries. Chlorine gas obtained is used for making bleaching powder (calcium hypochlorite)

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If a few drops of concentrated acid accidentally spill over the hand of a student, what should be done?

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Sodium hydrogen carbonate, when added to acetic acid, evolves a gas. Which of the following statements are true about the gas evolved?

(i) It turns lime water milky.


(ii) It extinguishes a burning splinter.


(iii) It dissolves in a solution of sodium hydroxide.


(iv) It has a pungent odour.

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One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is

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To protect tooth decay we are advised to brush our teeth regularly. The nature of toothpaste commonly used is