Question

Which hydride is the strongest base.

Answer 1

Hint : To answer this question, we first need to understand what are bases. There are three prevalent meanings of the word base in chemistry: Arrhenius bases, Brnsted bases, and Lewis bases. According to all definitions, bases are chemicals that react with acids, as proposed by G.-F. Rouelle in the mid-eighteenth century.

Complete Step By Step Answer:
Hydride - In chemistry, the anion of hydrogen is known as a hydride. The phrase is used in a broad sense. At one extreme, any compounds containing covalently bound H atoms are referred to as hydrides: water is an oxygen hydride, ammonia is a nitrogen hydride, and so on.
Hydrides are compounds and ions in which hydrogen is covalently bonded to a less electronegative element, according to inorganic chemists. The H core has a nucleophilic nature in these circumstances, which contrasts with the protic character of acids. The hydride anion is an extremely uncommon ion.
With the exception of He, Ne, Ar, Kr, Pm, Os, Ir, Rn, Fr, and Ra, almost all elements form binary compounds with hydrogen. Positronium hybrid, for example, is a rare chemical.
The covalent bonds between hydrogen and the other elements range from strong to weak. Some hydrides, such as boron hydrides, do not follow traditional electron-counting principles, and their bonding is explained using multi-centered bonds, whereas interstitial hydrides frequently use metallic bonding. Discrete molecules, oligomers or polymers, ionic solids, chemisorbed monolayers, bulk metals, and other materials can all be used as hydrides. While most metal hydrides react as Lewis bases or reducing agents, others act as hydrogen-atom donors and hence as acids.
So, we conclude that the strongest base hydride is ammonia.

Note :
pH is a scale used in chemistry to describe the acidity or basicity of an aqueous solution. The pH of acidic solutions is lower than that of basic or alkaline solutions. The pH scale is logarithmic, indicating the concentration of hydrogen ions in a solution in inverse order.