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: A is true but R is false

Solution

Lithium halides do exhibit some covalent character due to the small size and high charge density of lithium, which allows for some degree of electron sharing. However, the assertion that lithium has high polarization capability is incorrect; instead, it is the small size of lithium ions that leads to covalent character in its halides, not high polarization.

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 →