Single Choice

A metal which does not react with nitrogen is:

A$$Li$$
B$$K$$
Correct Answer
C$$Ca$$
D$$Mg$$

Solution

Only $$K$$ doesn't react with nitrogen directly, while others do.
The reactions are:

$$Li+N_2\rightarrow Li_3N$$

$$Mg+N_2\rightarrow Mg_3N_2$$

$$3Ca(s)+N_2(g)\rightarrow Ca_3N_2(s)$$

Lithium is the smallest atom among alkali metals. ... When Lithium reacts with nitrogen gas at room temperature (N2), it forms Lithium Nitride (Li3N) which is stable, because the lattice energy released from the formation of Li3N is high enough to make the overall reaction exothermic.

As K is a group 1 element, it will not react with N$$_2$$

Hence, the correct option is $$\text{B}$$

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)

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)

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

s - block Elements (Alkali and Alkaline Earth Metals)

Potassium is kept in

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