+91-8076753736 support@wiredfaculty.com
logo
logo

Sponsor Area

The S-Block Elements

Question
CBSEENCH11007107
Wired Faculty App

Why is sodium kept under kerosene oil?

Solution

Sodium cannot be kept in the air because its surface gets tarnished due to the formation of a layer of its oxide, hydroxide and carbonate on its surface. 
        4 Na plus straight O subscript 2 space rightwards arrow space space space 2 Na subscript 2 straight O Na subscript 2 straight O space plus space straight H subscript 2 straight O space space rightwards arrow space space 2 NaOH 2 NaOH space plus space CO subscript 2 space rightwards arrow space space space Na subscript 2 CO subscript 3 space plus space straight H subscript 2 straight O
Sodium cannot be kept in water because it reacts with water violently and hydrogen evolved catches fire.
 
2 Na plus 2 straight H subscript 2 straight O space space rightwards arrow space space space 2 NaOH space plus space straight H subscript 2 upwards arrow
Therefore, sodium is kept in kerosene oil.

Some More Questions From The s-Block Elements Chapter

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

The softness of group 1 elements increases down the group with increasing atomic number. Give reason. 

Which is the most reactive alkali metal and why?

Why alkali metals do not form M2+ ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Why alkali metals are normally kept in kerosene oil?

Why lithium cannot be stored in kerosene?

Why does lithium form complexes?

Why are alkali metal ions diamagnetic and colourless?

Why are alkali metals the most electropositive in nature?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation