ORGANIC CHEMISTRY

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How many isomers have the molecular formula C₃H₅Cl?
1. 3
2. 2
3. 4
4. 5
How many aldehydes and ketones are there with the molecular formula C₄H₈O ?
1. 3
2. 2
3. 5
4. 4
Which of the following represents a soap?
1. CH₃(CH₂)₁₆COOK
3. NaOH
4. CH₃COONa
Which formula represents a substance that can be oxidised to a ketone?
Which one of the following cannot be a product of oxidation of CH₃CH₂CH₂CH₂OH?
1. CO₂
2. CH₃COCH₂CH₃
3. CH₃CH₂CH₂CHO
4. CH₃CH₂CH₂COOH
Which one of the following compounds can form geometric (cis/trans) isomers?
1. 2-pentene
2. 2-methyl-1-butene
3. 1-butene
4. 1-pentene
A single organic compound has at least one correct name> How many of the following names are correct?

4-chlorohexane
3,3-dimethyl-3-hexene
cis-3-ethyl-3-hexene
cis-1-hexene
2-pentanol
1. 4
2. 2
3. 3
4. 1

In a series of experiments the following observations were made about a colourless liquid.

Experiment	Observation
Liquid was added to potassium dichromate solution	No visible reaction
Liquid was added to sodium metal	Colourless, odourless gas evolved, silvery solid dissolved
Liquid was added to ethanol and heated with concentrated sulfuric acid	Fruity smell produced

Which one of the following substances would produce all of these observations?

2-butanone
2-methyl-2-butanol
1-butanol
butanoic acid

0.100 mol of a compound has a mass of 9.00 g. Its empirical formula is CHO₂. What is the molecular formula of the compound?
1. C₄H₄O₈
2. C₂H₂O₄
3. CHO₂
4. C₃H₃O₆
How many alkenes have the molecular formula C₄H₈?
1. 5
2. 3
3. 6
4. 4
Which one of the following compounds will have geometric (cis/trans) isomers?
1. 1,1-dichloroethane
2. 1,2-dichloroethane
3. 1,1-dichlororethene
4. 1,2-dichlororethene
Which one of the following solutions could be used to distinguish between 2-methyl-2-propanol [(CH₃)₃COH] and butanoic acid [CH₃CH₂CH₂COOH]?
1. sodium hydrogen carbonate solution
2. a solution of bromine in water
3. dilute hydrochloric acid
4. a solution containing sulfuric acid and potassium dichromate
Which formula represents two substances which are geometric (cis/trans) isomers?
1. CH₃CHCHCH₃
2. H₂CC(CH₃)₂
3. C₃H₆
4. C₃H₈
Which of the following are examples of addition reactions?
1. All of I, II, III and IV
2. III and IV only
3. I and IV only
4. III only
Which one of the following compounds will react (in the presence of a concentrated sulfuric acid catalyst) with its own oxidised product to give a sweet-smelling liquid?
1. 2-propanol
2. propanone
3. 1-propanol
4. propanal
Which formula represents a compound which is both a ketone and a carboxylic acid?
1. Compound
2. Compound
3. Compound
4. Compound
Which one of the following pairs of compounds are isomers?
1. all of the above
2. (III) only
3. (II) only
4. (I) only
What is the correct name for the following formula?
1. 1,1,4,4-tetramethyl-3-butene
2. 2,5-dimethyl-4-hexene
3. 2,5-dimethyl-2-hexene
4. 1,1,4,4-tetramethylbutene
When a compound is shaken with a solution of bromine in water, the red brown colour of the bromine rapidly disappears. Which one of the following could the compounds be?
1. cyclohexane
2. 2-methylbutane
3. 2 bromopropane
4. 1-pentene
Ionisation of acetic (ethanoic acid) can be represented by the following equation

CH₃COOH(aq) + H₂O(l) <=> CH₃COO^- (aq) + H₃O⁺(aq)

Which one of the following would increase the concentration of acetate ions?
1. addition of a strong acid
2. addition of a weak acid
3. addition of a strong base
4. diultion with water
When the following pairs of substances react togther, hydrogen is evolved in three cases. In which one reaction is hydrogen not evolved?
1. ethanol and sodium metal
2. acetic acid (ethanoic acid) and sodium metal
3. lithium metal and water
4. concentrated nitric acid and copper metal

ORGANIC CHEMISTRY

Multiple Choice Quiz on Organic Chemistry