Order of Covalent bond; A. KF > KI; LiF > KF B. KF KF C. SnCl _ 4 >...

According to Fajan's Rule, small cation has more polarising power and larger anion has more polarisability. These small cations and larger anions favours covalent character.

A. $KF > KI$$-$False (Iodide is larger anion than fluoride)

$LiF > KF -$True (Lithium-ion is smaller cation than potassium ion)

B. $KF < KI -$True; $LiF > KF -$True

C. ${SnCl}_{4} > {SnCl}_{2} -$True(${Sn}^{4 +}$ is smaller than ${Sn}^{2 +}$);

The ions with pseudo inert gas configuration prefers the covalent character.

$CuCl > NaCl -$True(${Cu}^{+} ( 3{s}^{2}3{p}^{6}3{d}^{10} )$ ion has pseudo inert gas configuration)

D. $LiF > KF -$True; $CuCl < NaCl -$False

E. $KF < KI -$True; $CuCl > NaCl -$True