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Chemistry · 2023 · 3 marks
CBSE 2023 · Region 5 · Set 1 · Q28
(a) Illustrate Sandmeyer's reaction with an equation. (b) Explain, why ( CH_3)_2 NH is more basic than ( CH_3)_3 N in aqueous solution.
(a)
Illustrate Sandmeyer's reaction with an equation.
(b)
Explain, why $\displaystyle \left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$ is more basic than $\displaystyle \left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$ in aqueous solution.
Marking-scheme solution
(a) 
X = Cl, Br, CN
X = Cl, Br, CN(b) Combination of inductive effect and solvation effect / Due to greater H-bonding with water molecules, \(\displaystyle \left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}\) shows more hydration or solvation effect.
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CBSE Class 12 Chemistry past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.