Organic Chemistry & Analysis Random Retrieval

This quiz contains all the questions in the Organic Chemistry & Analysis section. The website will pick 10 questions at random.

1 / 10

This is the ¹³C NMR spectrum of:

1,2-dimethylbenzene

ethylbenzene

1,3-dimethylbenzene

1,4-dimethylbenzene

2 / 10

In which of these organic compounds are all the bonds non-polar?

(i) 1-bromobutane

(ii) butene

(iii) butan-2-ol

(iv) butane

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

3 / 10

Which of these statements defines a free radical?

an uncharged species

a species with an unpaired electron

an intermediate in a multi-step reaction

a species formed by breaking a covalent bond

4 / 10

Step 4:

aqueous sodium hydroxide/reflux

acidified K₂Cr₂O₇ with distillation of product

aqueous hydrochloric acid/reflux

acidified K₂Cr₂O₇ with reflux followed by distillation of product

5 / 10

If an amino acid is written as RCHNH₂CO₂H, in which of these amino acids is R a polar group?

(i) HSCH₂CHNH₂CO₂H

(ii) C₆H₅CH₂CHNH₂CO₂H

(iii) HOCH₂CHNH₂CO₂H

(iv) CH₃CHNH₂CO₂H

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

6 / 10

Which of these compounds are solids at room temperature?

(i) propane

(ii) propanoic acid

(iii) propylamine

(iv) 2-aminopropanoic acid

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

7 / 10

In the synthesis of ethylamine from bromoethane, the reaction is performed at a high pressure with a large excess of ammonia. The principal reason(s) for this include :

(i) increasing the rate of the reaction

(ii) to minimise the chance of diethylamine and triethylamine being produced

(iii) to push the equilibrium to the right, away from the ammonium salt towards the free amine.

(iv) to reduce the activation energy for the process

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

8 / 10

Which is the most typical reaction of an amine in organic synthesis?

nucleophilic addition

nucleophilic substitution

electrophilic addition

electrophilic substitution

9 / 10

The compound CH₃(CH₂)₄CH=CHCH₂CH=CH(CH₂)₆CO₂H is:

(i) a fatty acid

(ii) unsaturated

(iii) called octadec-9,12-dienoic acid

(iv) obtained by the hydrolysis of animal fats

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

10 / 10

The hydride ion, H^-, is:

(i) a reducing agent

(ii) a nucleophile

(iii) a base

(iv) a free radical

(i), (ii) and (iii)

(i) and (iii) only

(ii) and (iv) only

(iv) alone

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