CIE Chemistry (US-0439): Specimen Questions with Answers 203 - 204 of 240

Question number: 203

MCQ▾

Question

Saturated hydrocarbons are those which have ________ bond (s) only between all the adjacent carbon atoms of the organic compound.

Choices

Choice (4) Response

a.

Triple

b.

Single

c.

Double

d.

Question does not provide sufficient data or is vague

Answer

b.

Explanation

  • Saturated hydrocarbons are those which have single bond (s) only between all the adjacent carbon atoms of the organic compound. Alkanes are saturated hydrocarbons.

  • For example, propane , an alkane, is a saturated hydrocarbon.

Image shows the structure of propane

Image Shows the Structure of Propane

Image shows the structure of propane

  • Similarly all other alkanes have single bonds between each and every adjacent carbon atoms. Thus they are saturated hydrocarbons.

Question number: 204

Short Answer Question▾

Write in Short

The alkanes are a homologous series of hydrocarbons.

  1. What is meant by the term homologous series?

    ……………………………………………………………………………………………………………………

    ……………………………………………………………………………………………………………… [2]

Explanation

In organic chemistry, a homologous series is a series of compounds with the same general formula, usually varying by a single parameter. This can be the length of a carbon chain, [1] for example in the straight-chained alkanes (paraffins), or it could be the number of monomers in a homopolymer such as amylose. As shown in the diagram.

Iamge of Methane CH4

Iamge of Methane CH4

Iamge of Methane CH4

Image of Ethane C2H6

Image of Ethane C2H6

Image of Ethane C2H6

Image of Propane C3H8

Image of Propane C3H8

Image of Propane C3H8

Image of Butane C4H10

Image of Butane C4H10

Image of Butane C4H10

Image of Pentane C5H12

Image of Pentane C5H12

Image of Pentane C5H12