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Sodium Hydroxide Preparation

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PREPARATION AND USES OF SODIUM HYDROXIDE, BLEACHING POWDER, BAKING POWDER, WASHING SODA
Objective: To understand the use of common salt (NaCl) for preparation of chemicals such as Sodium hydroxide, Bleaching powder, Baking powder, Washing soda.

The common salt (Chemical formula-NaCl, Chemical name- Sodium chloride) that we eat in our daily diet is the raw material for preparation of chemical compounds such as Sodium hydroxide, Bleaching powder, Baking powder, Washing soda. NaCl is a neutral salt.
Sodium hydroxide (NaOH) also known as caustic soda is formed when electricity is passed through Brine [aqueous solution of sodium chloride (NaCl)] .This process is known as chlor-alkali process (Chlor for chlorine and alkali for NaOH). Hydrogen gas
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This sodium carbonate is dissolved in water and recrystallised to form washing soda.

Correct answer is - c

7) Which among the following is a neutral salt? a) Ammonium chloride b) Sodium Acetate c) Sodium chloride d) Sodium bicarbonate e) Magnesium nitrate

Hint: It is used in seasoning vegetable salads.

Explanation: Sodium chloride is a neutral salt and is used in preparation of food.

Correct answer is - c

8) Which among the following is an ingredient in antacid? a) Sodium chloride b) Sodium hydrogen carbonate c) Calcium chloride d) Sodium carbonate e) Calcium hydroxide

Hint: It is also used in baking industry.

Explanation: Baking soda is chemically known as Sodium hydrogen carbonate and is used in antacid preparation at, it is basic and can neutralise the acid in stomach.

Correct answer is - b

9) Match the common name of chemicals with their chemical formula.
A) Washing soda 1) NaHCO3
B) Slaked lime 2)CaOCl2
C) Caustic soda 3) Ca (OH)2
D) Baking soda 4) NaOH
E) Bleaching powder 5) Na2CO3.10H2O a. A-4, B-3, C-5, D-1, E-2 b. A-5, B-3, C-4, D-2, E-1 c. A-5, B-3, C-4, D-1, E-2 d. A-4, B-2, C-5, D-3,
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