NEET Practice Questions (MCQs) with Answers & Solutions

${\mathrm{C}}_3{\mathrm{H}}_9\mathrm{N}$

1. $$\begin{gathered} {\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{NH}}_2 \\ 1-\mathrm{Aminopropane} \end{gathered}$$

2. $$\begin{gathered} {\mathrm{CH}}_3-\underset{{\mathrm{NH}}_2}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_3 \\ 2-\mathrm{Aminopropane} \end{gathered}$$

3. $$\begin{gathered} {\mathrm{CH}}_3-\mathrm{NH}-{\mathrm{CH}}_2{\mathrm{CH}}_3 \\ \mathrm{Methyl} \mathrm{Amino} \mathrm{ethane} \end{gathered}$$

4. $$\begin{gathered} {\mathrm{CH}}_3-\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{N}}}-{\mathrm{CH}}_3 \\ \mathrm{Dimethyl} \mathrm{Amino} \mathrm{methane} \end{gathered}$$

(c) CHO C^*HOHCH₂OH has one asymmetric carbon (*).

Tartaric acid contains two asymmetric carbon atoms, leading to the existence of stereoisomers. It exists in three stereoisomeric forms: dextro, levo, and meso. Acetic acid, oxalic acid, and formic acid do not have any asymmetric carbon atoms, hence they do not exhibit stereoisomerism.

(b) A mixture of 50-50% of d and its l form is called racemic mixture.

(a) A characteristic of dextrorotatory.

(c) Glucose has aldehyde group and fructose keto group. The general formula for both is C₆H₁₂O₆.

(d) CH₃CHClCOOH contains asymmetric carbon atom.

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(c) CH₃ has sp²-hybridized carbon.

(d) The two butenes give different products on addition of Br2. cis butene gives racemic mixture whereas trans butene gives meso form of 2,3-dibromo butene.