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Which compound would be expected to have the lowest boiling point? (a) 2, 2-dime

ID: 537631 • Letter: W

Question

Which compound would be expected to have the lowest boiling point? (a) 2, 2-dimethylbutane (b) 2-methylpentane (c) hexane (d) octane In order for a nucleus of an atom to exhibit the NMR phenomenon, it must consist of (a) an odd number of protons (b) an odd number of neutrons (c) an odd number of both protons and neutrons (d) only one of the compositions described in a, b and c Reduction of 2-butanone gives a racemic mixture of 2-butanol. Enantiomerically pure (R)-2-butanol may be obtained by all the following except: (a) chromatographic separation on a chiral stationary phase. (b) reaction with an enzyme that reacts with the (S) enantiomer. (c) reaction with (+) tartaric acid and separation of diastereomers. (d) fractional distillation. Which one of these bonds will absorb infra-red radiation at the highest frequency? (a) C-Cl (b) C-H (c) C-O (d) C-N Which specie below is capable of electron delocalization/resonance?

Explanation / Answer

Which of boiling would be expected to have lowest boiling point

a) 2,2 -dimethylbutane

50 °C

answer

It is also known as neohexane

it is Less dense than water .

it is insoluble in water

b) 2 -methylpentane

60C

c)hexane

68 °C

straight-chain alkanes

d)octane

125 °C

straight-chain alkanes

In order for a nucleus of an atom to exhibit the NMR phenomenon, it must consist of

A. an odd number of protons

B. an odd number of protons and neutrons

C. an odd number of neutrons

D. any one of the compositions described in a, b, and c----------------answer

spinning of particles

a) 2,2 -dimethylbutane

50 °C

answer

It is also known as neohexane

it is Less dense than water .

it is insoluble in water

b) 2 -methylpentane

60C

c)hexane

68 °C

straight-chain alkanes

d)octane

125 °C

straight-chain alkanes

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