UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper II
Q11(b). Number of unit cells in 100 g of a cubic metal
Question
A metallic element exists as a cubic lattice. Each edge of the unit cell is 2.88 Å. The density of the metal is 7.20 g cm⁻³. How many unit cells will be there in 100 g of the metal?
Model answer
The free solution for 2022 answers questions 1, 2, 3, 4, 6, 7, 10, 12, 13 and 15, the ones picked in its time plan. Question 11 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Coversunit celldensityedge lengthcubic latticenumber of unit cells
All parts of Question 11
- 11(a) Particle in a box and the absorption bands of polyenes10 marks
- 11(b) Number of unit cells in 100 g of a cubic metal10 marks