Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q70 (CDS-II/2026) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Sodium metal is kept immersed in kerosene oil. This is because

Result
Your answer: —  ·  Correct: C

Explanation

Sodium is a highly reactive alkali metal. It reacts vigorously with both the oxygen and moisture (water vapor) present in the air. The reaction with water is highly exothermic: 2Na + 2H2O → 2NaOH + H2 + heat. The heat generated is often sufficient to ignite the hydrogen gas, leading to a fire or explosion. To prevent these dangerous reactions, sodium is stored under kerosene oil, which is a non-polar hydrocarbon that does not react with the metal and acts as a barrier against atmospheric gases. Sodium does not evaporate (Option A), and while it does oxidize/corrode in air (Option B), the primary reason for immersion in kerosene is its violent reactivity with moisture (Option C).

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
60%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-I · 2021 · Q10 Relevance score: 4.15

Which one of the following metals is kept immersed in Kerosene oil to protect it and to prevent accidental fire ?

IAS · 1998 · Q130 Relevance score: 3.61

Assertion (A) : Sodium metal is stored under kerosene. Reason (R) : Metallic sodium melts when exposed to air.

CDS-I · 2015 · Q49 Relevance score: 1.81

Sodium metal should be stored in

NDA-II · 2014 · Q60 Relevance score: -1.50

Kerosene oil rises in a wick of lantern because of

CDS-I · 2004 · Q12 Relevance score: -2.14

Alkali metals are usually kept under