Correct answer Carries: 4.
Wrong Answer Carries: -1.
Which amine shows no reaction with \( \ce{HNO2} \) at 273-278 K?
Tertiary amines like \( \ce{(CH3CH2CH2)3N} \) do not react with \( \ce{HNO2} \) to form alcohols or nitrosamines, as per the PDF’s chemical properties.
Which preparation method uses \( \ce{KOH} \) and \( \ce{Br2} \) to convert an amide to an amine?
The Hoffmann bromamide reaction uses \( \ce{Br2} \) and \( \ce{KOH} \) to convert an amide to an amine with one less carbon, as per the PDF’s preparation methods.
The carbon chain length of the amine from \( \ce{CH3CH2CH2CONH2} \) via Hoffmann bromamide reaction is:
Butanamide (\( \ce{CH3CH2CH2CONH2} \), 4 carbons) loses one carbon in the Hoffmann reaction, yielding propan-1-amine (\( \ce{CH3CH2CH2NH2} \), 3 carbons), as per the PDF.
The IUPAC name of \( \ce{CH3CH2N(CH3)CH2CH3} \) is:
For tertiary amines, the largest alkyl group is the parent. Here, it’s ethanamine with N-methyl and N-ethyl groups, named N-ethyl-N-methylethanamine, as per the PDF.
Which amine forms a yellow oily liquid with \( \ce{HNO2} \)?
Secondary amines like \( \ce{CH3CH2NHCH3} \) form nitrosamines (yellow oily liquids) with \( \ce{HNO2} \), as per the PDF’s chemical properties.
The product of aniline reacting with excess \( \ce{Br2} \) in water is:
Aniline (\( \ce{C6H5NH2} \)) with excess \( \ce{Br2} \) in water forms 2,4,6-tribromoaniline due to the strong activation by \( \ce{-NH2} \), as per the PDF.
The product of \( \ce{CH3CH2CH2NO2} \) reduction with \( \ce{Sn/HCl} \) is:
Reduction of 1-nitropropane (\( \ce{CH3CH2CH2NO2} \)) with \( \ce{Sn/HCl} \) yields propan-1-amine (\( \ce{CH3CH2CH2NH2} \)), as per the PDF’s preparation methods.
Which amine has the lowest basicity in aqueous solution?
Aniline (\( \ce{C6H5NH2} \)) has the lowest basicity due to resonance delocalizing the nitrogen lone pair, as per the PDF’s basicity section.
The IUPAC name of \( \ce{CH3CH2CH2NHCH3} \) is:
The largest alkyl group is propyl, with an N-methyl substituent, named N-methylpropan-1-amine, as per the PDF’s nomenclature.
Which amine has the highest solubility in water per carbon atom?
Methylamine (\( \ce{CH3NH2} \), 1C) has two N-H bonds for hydrogen bonding relative to one carbon, giving the highest solubility per carbon, as per the PDF.
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