Question

Which of the following statements are correct (0) NaCl is more ionic the KCI (ii) ZnCl2 is less ionic than CaCl2 (iii) CsCl has more ionic nature where as AgCl has more covalent nature (A) (i) and (ii) (B) (ii) and (iii) (c) (i) and (iii) Mark For Review & Next aranan​

Answer 1

Explanation:

Correct option is

D

MgO,LiF, MgF

2

Lattice energy depends upon two factors:

charge on ion (greater the charge higher is the lattice energy)

size of ion (smaller the size of ion greater is the lattice energy)

Among KCl and MgO, K has charge +1 and Mg has charge +2. Also, K

+

has larger ionic radii than Mg

+2

. So, both the factors add up and the lattice energy of MgO is higher than KCl.

LiF and LiBr have the same cation and same ionic charge. So lattice energy depends upon the size of anion. F

−

is smaller than Br

−

, therefore, lattice energy of LiF is higher than LiBr.

MgF

2

has a charge +2 while NaCl has a charge +1. Therefore, lattice energy of MgF

2

is higher than NaCl.

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