PrepRung
Sign inSign up free

NDA 2021 GAT · General Knowledge · Metals, Alloys and Corrosion · medium

Sodium is stored under kerosene to prevent its reaction with air and moisture. 2. Sodium reacts with water to liberate hydrogen gas.

Single correct option

Consider the following statements:
1. Sodium is stored under kerosene to prevent its reaction with air and moisture.
2. Sodium reacts with water to liberate hydrogen gas.
Which of the statements given above is/are correct?
  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2
Show answer and solution

Answer: (C) Both 1 and 2

Sodium is highly reactive and would catch oxygen and moisture from air, so it is immersed in kerosene. With water it forms sodium hydroxide and hydrogen gas, 2Na + 2H2O gives 2NaOH + H2, a reaction so exothermic that the hydrogen may ignite. Both statements are correct.
Report a mistake

Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake