JEE Main 2023Chemistrys Block ElementsMediumMCQ

JEE Main 2023 — s Block Elements Question with Solution

JEE Main 2023 (15 Apr Shift 1)

Question

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:

Choose an option

Show full solutionCorrect option: D
Correct answer
DA is false but R is true

Step-by-step explanation

In Be and Mg, the electrons are strongly bound. The energy required to excite these electrons is very high. Therefore, when the electron reverts back to its original position, the energy released does not fall in the visible region. Hence, no colour in the flame is seen.

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About this question

This is a previous-year question from JEE Main 2023, covering the s Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.