Question

Which of the following hydride is covalent?

• A. Ammonia
• B. Calcium hydride
• C. Potassium hydride
• D. Sodium hydride

Answer 1

The correct option is A

Ammonia

Explanation for the correct options:

a) Ammonia $\mathit{\left(}N{H}_3\mathit{\right)}$ :

• The nature of a hydride depends on the bond between the atoms of the compound.
• The bond between the Nitrogen $\left(\mathrm{N}\right)$ and the Hydrogen $\left(\mathrm{H}\right)$ atoms are covalent since both act as non metals.
• Because of this, Ammonia has a covalent hydride.
• So option (a) is correct answer.

Explanation for the incorrect options:

b) Calcium hydride$\left({\mathrm{CaH}}_2\right)$:

• The bond between Calcium and hydrogen atom is ionic.
• So, the hydride is an ionic hydride.
• So option (b) is an incorrect answer.

c) Potassium hydride$\left(\mathrm{KH}\right)$ :

• It has ionic bond between the atoms of Potassium hydride.
• As a result, it is an ionic hydride.
• So option (c) is an incorrect answer.

d) Sodium hydride $\left(\mathrm{NaH}\right)$ :

• The atoms are bonded together in an ionic bond.
• Thus it has an ionic hydride.
• So option (d) is an incorrect answer.

Hence, option (a) is correct. Ammonia $\mathit{\left(}N{H}_3\mathit{\right)}$ hydride is covalent