Chemistry — AS

Electronegativity & Bonding — Multiple-Choice Questions (Cambridge International AS Chemistry): Exam Questions

9 questions · 9 marks · ≈ 9 min

Guided practice

11 markeasy

Which bond is not correctly labelled with its dipole?

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21 markeasy

Which atom is the most electronegative?

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31 markeasy

Which statement about electronegativity and ionic bonding is correct?

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An ionic bond forms when both atoms have high electronegativity values.

An ionic bond forms when there is a large difference in electronegativity between two atoms.

An ionic bond forms when two atoms have identical electronegativity values.

The more electronegative atom in an ionic bond loses electrons.

41 markmedium

Which statement correctly describes the relationship between electronegativity difference and bond type?

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Two atoms with the same electronegativity always form a polar covalent bond

A large electronegativity difference always produces a polar covalent bond

As the electronegativity difference between two atoms increases, the ionic character of the bond increases

Electronegativity has no effect on whether a bond is ionic or covalent

51 markmedium

Which compound is the most ionic?

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KBr

MgBr₂

NaCl

RbCl

61 markmedium

Which substance contains polar covalent bonds?

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calcium bromide

chlorine

ethane

sulfur dichloride

71 markhard

The table shows the Pauling electronegativity values for five elements.

	Element	Pauling electronegativity value
	Fluorine	4.0
A	Copper	1.95
B	Hydrogen	2.2
C	Magnesium	1.3
D	Potassium	0.82

Which element forms a covalent bond with fluorine?

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81 markhard

Which statement about first ionisation energy and electronegativity is correct?

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Both first ionisation energy and electronegativity generally decrease down a group.

Both first ionisation energy and electronegativity generally increase down a group.

First ionisation energy decreases down a group, but electronegativity increases.

First ionisation energy increases down a group, but electronegativity decreases.

91 markhard

Which species is polar?

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H₂S

ICl₄^-

PF₅

SO₃

Element

Pauling electronegativity value

Fluorine

4.0

Copper

1.95

Hydrogen

2.2

Magnesium

1.3

Potassium

0.82