Exams › NEET › Chemistry

In which of the following processes, fused sodium hydroxide is electrolysed at a 330°C temperature for extraction of sodium?

1. Castner's process
2. Down's process
3. Cyanide process
4. Both 'b' and 'c'

Correct answer: Down's process

Solution

In Down's process, fused sodium hydroxide is electrolyzed at high temperatures (around 330°C) to extract sodium metal. The other processes do not involve this specific method.

Related NEET Chemistry questions

• Which one is malachite from the following?
• Which one of the following is a mineral of iron?
• Extraction of gold and silver involves leaching with CN⁻ ion. Silver is later recovered by
• Match items of Column I with the items of Column II and assign the correct code: Column-I: (A) Cyanide process (B) Froth flotation process (C) Electrolytic reduction (D) Zone refining Column-II: (i) Ultrapure Ge (ii) Dressing of ZnS (iii) Extraction of Al (iv) Extraction of Au (v) Purification of Ni
• In the extraction of copper from its sulphide ore, the metal finally obtained by the reduction of cuprous oxide with:
• The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag: Fe₂O₃(s) + 3CO(g) → 2Fe(l) + 3CO₂(g) CaCO₃(s) → CaO(s) + CO₂(g) CaO(s) + SiO₂(s) → CaSiO₃(s) 2C(s) + O₂(g) → 2CO(g)

⚔️ Practice NEET Chemistry free + battle 1v1 →