Question

Match the following:

a)	Saline hydride	(i)	CrH
b)	Electron-deficient hydride	(ii)	CH4
c)	Electron-precise hydride	(iii)	BeH2
d)	Electron-rich hydride	(iv)	B2H6
e)	Metallic hydride	(v)	H2O

Choose the correct option:

• A. a)-(iii); b)-(ii); c)-(iv); d)-(v); e)-(i)
• B. a)-(iii); b)-(v); c)-(iv); d)-(ii); e)-(i)
• C. a)-(iv); b)-(ii); c)-(iii); d)-(v); e)-(i)
• D. a)-(iii); b)-(iv); c)-(ii); d)-(v); e)-(i)
• E. a)-(iii); b)-(i); c)-(ii); d)-(iv); e)-(v)

Answer 1

The Correct Option is D

Saline hydride (a): This is a hydride formed by a metal (usually alkali or alkaline earth metals) reacting with hydrogen. The typical example is BeH₂, which is (iii).
Electron-deficient hydride (b): These are hydrides where the central atom does not have a complete octet, such as B₂H₆, which is (iv).
Electron-precise hydride (c): These hydrides have a perfect balance of electrons, like CH₄ (methane), which is (ii).
Electron-rich hydride (d): These are hydrides where the central atom has more than an octet of electrons, like H₂O (water), which is (v).
Metallic hydride (e): These hydrides are formed by transition metals, typically with the formula CrH, which is (i).

The correct option is (D) : a)-(iii); b)-(iv); c)-(ii); d)-(v); e)-(i)