Match the chemical substances given in column (I) with their appropriate application given in column (II).
Column (I)
(A) Bleaching Powder
(B) Baking Soda
(C) Washing Soda
(D) Sodium Chloride
Column (II)
(i) Preparation of glass
(ii) Production of H2 and Cl2
(iii) Decolourisation
(iv) Antacid

Correct option is D

The correct answer is (d) A-(iii) B-(iv) C-(i) D-(ii).
· Bleaching powder (Calcium hypochlorite) is commonly used for decolourisation and disinfecting water.
· Baking soda (Sodium bicarbonate) acts as an antacid, neutralizing stomach acid.
· Washing soda (Sodium carbonate) is used in the preparation of glass and as a cleaning agent.
· Sodium chloride (common salt) is essential for the production of H2 (hydrogen) and Cl2 (chlorine) through electrolysis.
Important Key Points:
· Bleaching powder: Decolourisation and disinfection.
· Baking soda: Antacid.
· Washing soda: Preparation of glass, cleaning agent.
· Sodium chloride: Production of hydrogen and chlorine.
Knowledge Booster:
· Bleaching Powder (ii) Preparation of glass: Incorrect usage, not typically associated with glass preparation.
· Baking Soda (i) Preparation of glass: Incorrect, it is mainly used as an antacid.
· Washing Soda (iv) Antacid: Incorrect, it is used for glass preparation and cleaning.
· Sodium Chloride (iii) Decolourisation: Incorrect, mainly used for producing hydrogen and chlorine.