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JEE Main 31 August 2021, Shift 2, Chemistry Q52

Question 52 of 90 in this shift, Chemistry question 22 of 30, Section B.

The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the octahedral sites in

\mathrm{A_xB}

. The value of

x

is __________. (Integer answer)

Official answer

NTA final key.

Chapter: The Solid State
Topic: Crystal Lattices
Idea tested: Empirical Formula from Void Occupancy

Same idea in other shifts

Asked 4× in all

24 Jun 2022, Shift 1 · Q81Atoms of element X form hcp lattice and those of element Y occupy $\frac{2}{3}$ of its tetrahedral voids. The percentage of element X in…MediumNumerical value
26 Jun 2022, Shift 2 · Q82In a solid AB, A atoms are in ccp arrangement and B atoms occupy all the octahedral sites. If two atoms from the opposite faces are…MediumNumerical value
6 Sep 2020, Shift 2 · Q41A crystal is made up of metal ions 'M $_1$ ' and 'M $_2$ ' and oxide ions. Oxide ions form a ccp lattice structure. The cation 'M $_1$ '…MediumSingle correct

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.