Question

Ionic hydride reacts with water to give
A.Hydride ions
B.Acidic solution
C.Protons
D.Basic solution

Answer 1

Hint: We need to know that a hydride is formally the hydrogen anion, \[{{\text{H}}^{\text{ - }}}\], in chemistry. The phrase is used in a broad sense. At one extreme, hydrides are all compounds with covalently attached H atoms, water is a hydride of oxygen, ammonia is a hydride of nitrogen, and so on. Hydrides are compounds and ions in which hydrogen is covalently bonded to a less electronegative element, according to inorganic chemists.

 Complete answer:
We should know that under the right conditions, dihydrogen can combine with practically every element except noble gases to form binary compounds called hydrides. They can be represented as \[E{H_x}\], where E represents an element.
Ionic (or salt-like) hydrides are highly electropositive binary complexes of hydrogen with s-block elements in nature. Lithium, beryllium, and magnesium compounds, on the other hand, have a higher covalent nature. Ionic hydrides, such as sodium hydride and calcium hydride, are formed when electrons from a metal atom are transferred to a hydrogen atom.
Ionic hydrides react vigorously with water to form basic solutions and liberate hydrogen gas. For example, when sodium hydride reacts with water, sodium hydroxide and hydrogen gas are formed.

 Thus, the correct option is D.

 Note:
We must be noted that depending on the behaviour and nature of the bond established between the hydrogen atom and the element, there are three types of hydrides. Ionic (or salt-like) hydrides, covalent (or molecular) hydrides, and metallic (or non-stoichiometric) hydrides are the three types of hydrides. In their solid state, ionic hydrides are crystalline and have high melting and boiling temperatures.