Question

(c) Why is metal 'M' stored under kerosene?
(d) If oxide of this metal is treated with hydrochloric acid, what would be
the products ?
(e) Write balanced equations for :
(i) Reaction of 'M' with air.
(ii) Reaction of 'M' with water.
(iii) Reaction of metal oxide with hydrochloric acid.
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Answer 1

Explanation:

metal M - Sodium

c) metals like sodium and potassium are kept under kerosine because if they are left open then they may catch fire.Hence to prevent any accidental fires.

d)As a strong base , sodium oxide reacts with acids. it would react with dilute hydrochloric acid to produce sodium chloride solution.

e) I) Na2O + 2HCL ---->2NaCl + H20

ii) 4Na2+O2 -------> 2Na2O

iii)2Na+ 2H20 -------> 2NaOH + H2 + heat energy