NTA Abhyas JEE Main2020Chemistrys Block ElementsPractice
Match the reactions given in column (I) with process/products in column (II) and select the proper code of choice from the choices given at the end. (I) (II) (A) NaCl(aq) → Na + +Cl − Na + + e − → Na(s) 2Cl − → Cl 2 g +2e − p ) Castner Kellner Cell (B) NaCl aq ⟶ Na aq + + Cl aq - Na + + e - ⟶ Hg Na - Hg 2 Cl - ⟶ Cl 2 + 2 e - Na - Hg + H 2 O ⟶ NaOH + Hg + 1 2 H 2 q) Bleaching Powder (C) 2 Ca OH 2 + 2 Cl 2 ⟶ CaCl 2 + C
Options
- AA → (s); B → (p); C → (q); D → (r)
- BA → (r); B → (p); C → (s); D → (q)
- CA → (p); B → (s); C → (r); D → (q)
- DA → (r); B → (q); C → (p); D → (s)
Correct answer
A. A → (s); B → (p); C → (q); D → (r)
Step-by-step solution
Sodium metal It is manufactured by electrolysis of a fused mixture of NaCl   (40%) and CaCl 2   (60%) in Down's cell at 873   K . Na liberated at the cathode is collected, in kerosene oil while Cl 2 is evolved at the anode. NaCl l ⁡ → Electrolysis Na + + Cl - At cathode Na + + e - ⟶ Na l ⁡ At anode 2 Cl - ⟶ Cl 2 g + 2 e - Sodium hydroxide It is manufactured by electrolysis of an aqueous solution of NaCl (brine) in Castner - Kellner cell using mercury cathode and