UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper III
Q9(b). Cannizzaro reaction: effect of para substituents on the rate
Question
Compare the rate of Cannizzaro’s reaction for the following aromatic aldehydes and justify your answer: [structures I, II and III of substituted benzaldehydes given in the paper]
Model answer
The free solution for 2022 answers questions 1, 4, 5, 6, 7 and 10, the ones picked in its time plan. Question 9 is answered in full in the Geo-Scientist Chemistry Paper III, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper III: Model Answers 2021 to 2025
- All ten questions of each paper, with the question printed above its answer
- Instruments drawn as labelled diagrams, numericals worked with units
- Topic-wise weightage and a topic-wise index
CoversCannizzaro reactionhydride transfersubstituent effectp-nitrobenzaldehydep-methoxybenzaldehyde
All parts of Question 9
- 9(a) Gramine route to indole-3-acetic acid; photolysis of cyclodecanone10 marks
- 9(b) Cannizzaro reaction: effect of para substituents on the rate5 marks
- 9(c) IR: C=C stretch of small-ring alkenes; class of a nitrogen compound5 marks
- 9(d) Four conversions: structures of the products10 marks