NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals

CaO and NaCl have the same crystal structure and nearly the same...

CaO and NaCl have the same crystal structure and nearly the same ionic radii. If 'u' is the lattice energy of NaCl, the lattice energy of CaO is very nearly

Options

A4u
B2u
Cu
Du/2

Correct answer

A. 4u

Step-by-step solution

Lattice energy

∝ \dfrac{\text{Product of charges on ions}}{\text{Interionic distance}}

In CaO, the charges on cation and anion are twice the magnitude of charges on the cation and anion of NaCl. The interionic distance is the same.

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