LiF and NaBr are ionic salts that both form a face centred cubic lattice. The ionic radii of Li^ + , F^ - , Na^ + and Br^ - are 0.76,1.33,1.02 and 1.96 ~A^0 respectively, which of the following statement is / are true

Correct answer: D. The lattice energy of LiF is greater in magnitude than the lattice energy of NaBr Radius of cation is smaller than parent atom and that of anion is more than parent atom

JEE Advanced

Exam: JEE Advanced
Subject: Chemistry
Chapter: Solid State

JEE Advanced · Chemistry · Solid State

LiF and NaBr are ionic salts that both form a face centred cubic...

LiF and NaBr are ionic salts that both form a face centred cubic lattice. The ionic radii of

\mathrm{Li}^{+}, \mathrm{F}^{-}

\mathrm{Na}^{+}

and

\mathrm{Br}^{-}

are

0.76,1.33,1.02

and

1.96 \mathrm{~A}^0

respectively, which of the following statement is / are true

Options

AThe atomic radius of Na is smaller than $1.0 \mathrm{~A}^0$
BThe atomic radius of $F$ is smaller than $1.33 \mathrm{~A}^0$
CEach $\mathrm{Li}^{+}$ ion in LiF has $8 \mathrm{~F}^{-}$ ions as nearest neighbors
DThe lattice energy of LiF is greater in magnitude than the lattice energy of NaBr

Correct answer

D. The lattice energy of LiF is greater in magnitude than the lattice energy of NaBr

Step-by-step solution

Radius of cation is smaller than parent atom and that of anion is more than parent atom

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