Exams › JEE Main › Chemistry

Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R. Assertion A: Lithium halides are some what covalent in nature. Reason R: Lithium possess high polarisation capability. In the light of the above statements, choose the most appropriate answer from the options given below: (1) A is true but R is false (2) A is false but R is true (3) Both A and R are true but R is NOT the correct explanation of A (4) Both A and R are true and R is the correct explanation of A

1. A is true but R is false
2. A is false but R is true
3. Both A and R are true but R is NOT the correct explanation of A
4. Both A and R are true and R is the correct explanation of A

Correct answer: Both A and R are true and R is the correct explanation of A

Solution

Lithium halides have appreciable covalent character because the very small Li+ ion has high polarising capability, distorting the halide electron cloud (Fajans' rules). Both A and R are true and R is the correct explanation of A (index 3).

Related JEE Main Chemistry questions

• Which statement correctly describes how chemical reactivity changes down the group for alkali metals and halogens?
• Which of the following is a true peroxide?
• When zeolite, a hydrated sodium aluminium silicate, is used with hard water, which ions from the water replace the sodium ions in the zeolite?
• Among the following carbonates, which one is the least thermally stable?
• The solubility of carbonates falls as we move down the magnesium group because there is a reduction in the
• Which of the following salts fails to give any colour in a flame test?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →