JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 15 April 2023, Shift 1, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

Which of the following expressions is correct in case of a CsCl unit cell (edge length 'a')?

(1) $r_{\mathrm{Cs^+}} + r_{\mathrm{Cl^-}} = a$
(2) $r_{\mathrm{Cs^+}} + r_{\mathrm{Cl^-}} = \frac{a}{\sqrt{2}}$
(3) $r_{\mathrm{Cs^+}} + r_{\mathrm{Cl^-}} = \frac{\sqrt{3}}{2}a$ Official answer
(4) $r_{\mathrm{Cs^+}} + r_{\mathrm{Cl^-}} = \frac{a}{2}$

Official answer

Option 3

NTA final key.

Chapter: The Solid State
Topic: Crystal Lattices
Idea tested: Edge-Radius Relationships

Same idea in other shifts

Asked 4× in all

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29 Jul 2022, Shift 1 · Q82Ionic radii of cation $\mathrm{A^+}$ and anion $\mathrm{B^-}$ are 102 and 181 pm respectively. These ions are allowed to crystallize into…MediumNumerical value

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.