UPSC Combined Geo-Scientist, Mains · 2021 · Mains Paper II
Q11(b). Ionic, covalent, molecular and metallic crystals
Question
Classify the solid state of the following substances as ionic / covalent / molecular / metallic crystals and explain. SiC, S₄, KBr, LiCl, Mg
Model answer
The free solution for 2021 answers questions 1, 2, 3, 4, 6, 7, 10, 12, 14 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
Coverstypes of crystalsionic crystalcovalent network solidmolecular crystalmetallic crystal
All parts of Question 11
- 11(a) Boyle temperature and its meaning for H₂, He, N₂ and NH₃10 marks
- 11(b) Ionic, covalent, molecular and metallic crystals5 marks
- 11(c) Temperature dependence of electrolytic and metallic conduction5 marks