Question

which of the following hydride is a very powerful reducing agent?
a. NaH
b. MgH2
c. AlH3
d. NiH0. 6​

Answer 1

Answer:

a) NaH

Explanation:

nah is very powerful reducing agent

Answer 2

Answer:

NaH(a) is a strong reducing agent.

Explanation:

To understand what is a reducing agent we must first have to understand a Redox reaction.

A Redox reaction is a chemical reaction in which reduction and/or oxidation occurs.

• Reduction: Loss of Oxygen (or electron) and/or addition of Hydrogen.
• Oxidation: Loss of Hydrogen and/or addition of Oxygen.

Now what is a Oxidising agent or a Reducing agent?

• Oxidising agent: The atom/molecule (reactant) which oxidises (addition of oxygen/loss of hydrogen) the other reactant in a chemical reaction.
• Reducing agent: The reactant which reduces (addition of hydrogen/loss of oxygen) the other reactant in a chemical reaction.

The strength (strong/weak) reducing agent is relative to the the strength of the corresponding oxidising agent and vice-versa.

i.e.

• The stronger the oxidising agent, weaker the reducing agent.

Similarly,

• The stronger the reducing agent, weaker the oxidising agent.

So, NaH is a very strong reducing agent.