MolSynapsequestion bank

MolSynapse / Question bank / Chemical Bonding / Fajans rules and ionic character

JEE Main levelSingle correct optionDifficulty 2 of 3cb182

Assertion (A): $LiI$ is more covalent than $LiF$ . Reason (R): $I X^{-}$ is larger and more polarisable than $F X^{-}$ .

ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true

Answer: A

The cation is common, so the anion decides.

I X^{-}

is large and its electron cloud is easily distorted by

Li X^{+}

, while

F X^{-}

is small and hard to polarise. Thus A is true and R is its correct explanation.

Practice Chemical Bonding More on Fajans rules and ionic character

Previous questionNext question

More questions on Fajans rules and ionic character

Which of the following chlorides has the lowest melting point? JEE Main level
The correct order of increasing covalent character of silver halides is JEE Main level
Which of the following carbonates decomposes at the lowest temperature? JEE Main level
SnCl4 is a volatile liquid whereas SnCl2 is a solid with a much higher melting point. The best reason is that JEE Main level
Observed dipole moment and bond length of four gaseous diatomic molecules are: P (3.5 D, 100 pm), Q (9.2 D, 400 pm), R (1.80 D, 92 pm), S (0... JEE Main level
Which of the following statements are correct? JEE Main level