MCQ Questions

Question No. 1

Give one term for each of the following descriptions.

Answer :

a) Compounds that contain carbon and hydrogen atoms only

b) The distinctive group of atoms that is responsible for the characteristic chemical reactions of that compound

c) A family of organic molecules with the same functional group

d) The property of compounds that contain double and triple bonds, allowing them to undergo addition reactions

e) The homologous series where the prefix is the active site

f) The general formula for the alkanes

g) Compounds with the same molecular formula, but different structural formulae

h) The system that we use to name organic compounds in a systematic way

i) The group of compounds that is our main fuel source

j) The type of reaction in which a water molecule is added to an alkene

Question No. 2

Explain the following terms used in organic chemistry and give examples of each:

Answer :

a) general formula

b) homologous series

c) isomerism

Question No. 3

The following diagrams show the structures of isomers of C₅H₁₂:

Answer :

a) To which homologous series do the isomers belong?

b) Compound A reacts with bromine. i) Draw the full structural formula of the product and give its IUPAC name. ii) What type of reaction has taken place? iii) What do you observe during the reaction?

c) Compound B is mixed with hydrogen gas and passed over a Pd‐catalyst. i) Draw the full structural formula of the product and give its IUPAC name. ii) What is this type of reaction called? iii) How is this reaction used in industry?

d) Compound C is reacted with steam in the presence of phosphoric acid. i) Name the type of reaction that occurs. ii) Draw the full structural formula of the product that forms.

e) Give the IUPAC names for structures C, D and E.

Question No. 4

Consider the following compounds:

Answer :

a) A

b) B

Question No. 5

A saturated carbon with 8 carbon atoms is cracked to produce two products with four carbon atoms each.

Answer :

a) Why are saturated carbon compounds cracked?

b) Give the formula of the original hydrocarbon.

c) Use condensed structural formulae to write a balanced equation for the above reaction. Show structural isomers.

d) Give the IUPAC names of the products.

e) Explain the two different types of cracking.

Chapter

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