IGCSE Chemistry: Specimen Questions with Answers 113 - 114 of 240

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Question 113

Question

MCQ▾

The functional group present in Acetic acid is:

Choices

Choice (4)

a.

O2H2

b.

CHO

c.

OH

d.

COOH

Answer

d.

Explanation

Correct option is D. Functional group is an atom or a group of atoms which defines the structure and the chemical and physical properties of a particular family of the organic compounds.

Carboxylic acid has functional group

Carboxylic Acid Has -COOH Functional Group

Question 114

Question

MCQ▾

An organic compound contains carbon atoms & hydrogen atoms. This organic compound is a hydrocarbon. The probable type of the given hydrocarbon is ________.

Choices

Choice (4)

a.

Alkyl group

b.

Alkane

c.

Alkyne

d.

Alkene

Answer

b.

Explanation

The general formula of alkane is , where n is the number of carbon atoms.

So the number of hydrogen atoms in the

Number of carbon atoms given

Number of hydrogen atoms given

Therefore number of hydrogen atoms that should be present in the alkane containing 4 carbon atoms

Thus the number of hydrogen atoms present in the given organic compound is in accordance with the number of hydrogen atoms that should be present in an alkane containing 4 carbon atoms. Thus the given hydrocarbon is an alkane.

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