JEE Main 2023 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 15 April 2023, Shift 1, Chemistry Q67

Question 67 of 90 in this shift, Chemistry question 7 of 30, Section A.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R : Assertion (A) :

\mathrm{BeCl_2}

and

\mathrm{MgCl_2}

produce characteristic flame Reason (R) : The excitation energy is high in

\mathrm{BeCl_2}

and

\mathrm{MgCl_2}

In the light of the above statements, choose the correct answer from the options given below :

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

Official answer

Option 4

NTA final key.

Chapter: The s-Block Elements
Topic: s-Block Elements
Idea tested: Flame Coloration

Same idea in other shifts

Asked 7× in all

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.