Amines
5 Board Chemistry previous year questions on Amines — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.
4-nitrotoluene is treated with \({\mathrm{Br}}_{2}\) to get compound P which is reduced with Sn and HCl to get Compound Q, then Q is diazotized and the product is treated with phosphinic acid to get R is oxidized with alkaline \({\mathrm{KMnO}}_{4}\) to get the final product
(JEE mains memory based shift-1 23/01/2025)
2-Bromo Benzoic acid
1.4-Nitrotoluene + Br₂: Bromination at the meta position forms 2-Bromo-4-nitrotoluene (Compound P).
2.P + Sn/HCl: Reduction of the nitro group forms 2-Bromo-4-aminotoluene (Compound Q).
3.Q + NaNO₂/HCl: Diazotization forms a diazonium salt.
4.Diazonium salt + H₃PO₄: Forms 2-Bromo-4-hydroxybenzene (Compound R).
5.R + KMnO₄ (alkaline): Oxidation forms 2-Bromo-4-carboxybenzoic acid (final product).
Identify the major product \(C\) formed in the following reaction sequence
\({\mathrm{CH}}_{3}-{\mathrm{CH}}_{2}-{\mathrm{CH}}_{2}-\mathrm{I}\overset{\mathrm{NaCN}}{\to }\mathrm{A}\)
\(\overset{{\mathrm{OH}}^{-}}{\underset{\mathrm{Partial}\mathrm{hydrolysis}}{\to }}\mathrm{B}\overset{\mathrm{NaOH}}{\underset{{\mathrm{Br}}_{2}}{\to }}\underset{(\mathrm{major})}{\mathrm{C}}\)
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Carbylamine test is performed in alc. \(\mathrm{KOH}\) by heating a mixture of
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Which of the following will give azo dye test?
Memory Based Question 29/Jan/25 Evening shift
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Carbylamine test is performed in alc. \(\mathrm{KOH}\) by heating a mixture of
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