Chapter 1: Problem 91
Which of the following is an isomer of 2, 2 -dimethyl propane? (a) Neopentane (b) 2-Methyl butane (c) Cyclopentane (d) Methyl cyclobutane
Chapter 1: Problem 91
Which of the following is an isomer of 2, 2 -dimethyl propane? (a) Neopentane (b) 2-Methyl butane (c) Cyclopentane (d) Methyl cyclobutane
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Get started for free4-Nitroaniline is a weaker base compared to 4 -cyanoaniline. This is because (a) both nitro and cyano are strong electron withdrawing groups. (b) the lone pair of nitrogen of the \(\mathrm{NH}_{2}\) group is delocalised in 4 -nitro aniline and not in 4 -cyanoaniline. (c) the negative charge resides on the more electronegative oxygen in nitro aniline in the resonance delocalization. (d) cyano group is aligned planar with the ring.
IUPAC name of the compound (a) Trans-3,4-dimethylhex-3-ene (b) Cis- 3,4 -dimethylhex-3-ene (c) Cis- 3,4 -dimethylhex-4-ene (d) Cis-2,3-diethylbut-2-ene
Which of the following pairs are isostructural? (a) \({\mathrm{C}} \mathrm{C}_{3}\) and \(\mathrm{CH}_{3}^{-}\) (b) \(\ddot{\mathrm{N} H}_{3}\) and \(\mathrm{CH}_{3}^{-}\) (c) \(\ddot{\mathrm{N} H}_{3}\) and \(\mathrm{CH}_{3}^{-}\) (d) \(\mathrm{BCl}_{3}\) and \(\mathrm{CH}_{3}{ }^{+}\)
Identify the statement which is not correct. (a) Diastereomers are always optically active. (b) \(\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CHOHCH}_{3}\) is known by the IUPAC name as hex-5-yn-2-ol. (c) An achiral molecule is one which has a super imposable mirror image. (d) Only one monochloro derivative is possible for neopentane.
The specific rotation of a pure optically active compound is \(+12^{\circ} .\) The specific rotation of the sample in a reaction with \(20 \%\) racemization and \(80 \%\) retension of configuration will be (a) \(+12^{\circ}\) (b) \(-12^{\circ}\) (c) \(+9.6^{\circ}\) (d) \(-2.4^{\circ}\)
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