JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 25 February 2021, Shift 2, Chemistry Q52

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

The unit cell of copper corresponds to a face centered cube of edge length 3.596 Å with one copper atom at each lattice point. The calculated density of copper in kg/m

^3

is ________. [Molar mass of Cu : 63.54 g ; Avogadro Number

=6.022\times10^{23}

]

Official answer

9076

NTA final key.

Chapter: The Solid State
Topic: Crystal Lattices
Idea tested: Unit Cell Density

Same idea in other shifts

Asked 9× in all

11 Apr 2023, Shift 1 · Q82An atomic substance A of molar mass $12\ \mathrm{g\ mol^{-1}}$ has a cubic crystal structure with edge length of 300 pm. The no. of atoms…MediumNumerical value
28 Jul 2022, Shift 1 · Q82An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is…MediumNumerical value
28 Jul 2022, Shift 2 · Q52Metal M crystallizes into a fcc lattice with the edge length of $4.0\times10^{-8}$ cm. The atomic mass of the metal is ______ g/mol.…EasyNumerical value
25 Jun 2022, Shift 1 · Q82The distance between $\mathrm{Na^+}$ and $\mathrm{Cl^-}$ ions in solid NaCl of density $43.1\ \mathrm{g\ cm^{-3}}$ is __________…MediumNumerical value
30 Jun 2022, Shift 1 · Q61An element X has a body centred cubic (bcc) structure with a cell edge of 200 pm. The density of the element is 5 g cm $^{-3}$ . The number…MediumSingle correct
22 Jul 2021, Shift 2 · Q52A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies.…MediumNumerical value
3 Sep 2020, Shift 1 · Q47An element with molar mass $2.7\times10^{-2}$ $\mathrm{kg\ mol^{-1}}$ forms a cubic unit cell with edge length 405 pm. If its density is…MediumNumerical value
5 Sep 2020, Shift 1 · Q40A diatomic molecule $\mathrm{X_2}$ has a body-centred cubic (bcc) structure with a cell edge of 300 pm. The density of the molecule is…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.