Exams › JEE Main › Chemistry

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R: Assertion (A) : BeCl2 and MgCl2 produce characteristic flame. Reason (R) : The excitation energy is high in BeCl2 and MgCl2. In the light of the above statements, choose the correct answer from the options given below : (1) (A) is true but (R) is false (2) Both (A) and (R) are true but (R) is NOT the correct explanation of (A) (3) Both (A) and (R) are true and (R) is the correct explanation of (A) (4) (A) is false but (R) is true

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

Correct answer: (4) (A) is false but (R) is true

Solution

BeCl2 and MgCl2 do not produce characteristic flames, making the assertion false. However, the reason provided about high excitation energy in these compounds is true, as it relates to their electronic structure and behavior.

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 →