IGCSE Chemistry: Specimen Questions with Answers 100 - 102 of 240

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Question 100

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Short Answer▾

The table shows some physical properties of the Group VII elements.

Some Physical Properties of the Group VII Elements

A chlorine atom has electrons.

Complete the following structure to show how the electrons are arranged.

Explanation

Image result for electronic configuration of chlorine

Electronic Configuration of Chlorine

Image result for electronic configuration of chlorine

Electronic Configuration of Chlorine Cl

Question 101

Question

MCQ▾

The number of valence electrons equals the ________ number of the element.

Choices

Choice (4)

a.

Period

b.

Group

c.

All of the above

d.

Question does not provide sufficient data or is vague

Answer

b.

Explanation

The number of valence electrons equals the ‘group’ number of the element.

Question 102

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Short Answer▾

Malonic acid reacts with ethanol to form a colorless liquid which has a ‘fruity’ smell. Its structural formula is given below.

‘Fruity’ Smell
Compound Contains

What type of compound contains the group which is circled?

[1 Marks]

Compound Contains

Explanation

Carbonyl: A carbon-oxygen double bond. The carbon atom has two bonds left over that can be attached to other atoms.

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