Single Choice

When sodium is heated in moist air, the ultimate product obtained is:

A$$\displaystyle Na_{2}O $$
B$$NaOH$$
C$$\displaystyle Na_{2}CO_{3} $$
Correct Answer
D$$\displaystyle Na_{2}O_{2} $$

Solution

When sodium is heated with moist air, the ultimate product obtained is $$\displaystyle Na_2CO_3 $$.
In moist air, a layer of sodium oxide, hydroxide and carbonate is formed on its surface due to which, it loses its lustre.
The complete reaction sequence is as follows:
$$\displaystyle 4Na + O_2 \rightarrow 2Na_2O \xrightarrow {2H_2O} 4NaOH \xrightarrow {2CO_2} 2 Na_2CO_3 + 2H_2O $$

SIMILAR QUESTIONS

s - block Elements (Alkali and Alkaline Earth Metals)

Sodium burns in excess air to give mainly:

s - block Elements (Alkali and Alkaline Earth Metals)

Caustic alkalis are corrosive.

s - block Elements (Alkali and Alkaline Earth Metals)

Sodium metal cannot be stored under

s - block Elements (Alkali and Alkaline Earth Metals)

The violet flame shown by potassium in Bunsen flame is due to jumping of the electron from :

s - block Elements (Alkali and Alkaline Earth Metals)

A metal which does not react with nitrogen is:

s - block Elements (Alkali and Alkaline Earth Metals)

Why is calcium preferred over sodium to remove the last traces of moisture from alcohol?

s - block Elements (Alkali and Alkaline Earth Metals)

Why is sodium metal kept under kerosene oil ?

s - block Elements (Alkali and Alkaline Earth Metals)

Why is calcium preferred over sodium to remove last traces of moisture from alcohol?

s - block Elements (Alkali and Alkaline Earth Metals)

The alkali metal that reacts with nitrogen directly to form nitride is:

s - block Elements (Alkali and Alkaline Earth Metals)

Potassium is kept in

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