A LevelChemistryCambridge (CIE)Exam Questions3. Chemical BondingElectronegativity & Bonding

Electronegativity & Bonding (Cambridge (CIE) A Level Chemistry): Exam Questions

Exam code: 9701

1 hour14 questions

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Electronegativity & Bonding

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1
1 mark

Which bond is not correctly labelled with its dipole?

  • Dipole diagram showing C−O single bond labelled δ+C−Oδ−
  • Dipole diagram showing C=O double bond labelled δ+C=Oδ−
  • Dipole diagram showing C−H bond labelled δ+C−Hδ− (incorrect polarity)
  • Dipole diagram showing C−Cl bond labelled δ+C−Clδ−

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2
1 mark

Which atom is the most electronegative?

  • Br

  • Cl

  • Mg

  • Na

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3
1 mark

Which statement about electronegativity and ionic bonding is correct?

  • 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.

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1
1 mark

Which element has an electronegativity most similar to that of beryllium?

  • Aluminium

  • Boron

  • Indium

  • Silicon

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2
1 mark

Which compound is the most ionic?

  • KBr

  • MgBr2

  • NaCl

  • RbCl

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3
1 mark

Which substance contains polar covalent bonds?

  • calcium bromide

  • chlorine

  • ethane

  • sulfur dichloride

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1
1 mark

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

Use the data to deduce which element forms a covalent bond with fluorine.

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    2
    1 mark

    Which statement about first ionisation energy and electronegativity is correct?

    • 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.

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    3
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    1 mark

    Which species is polar?

    • H2S

    • ICl4-

    • PF5

    • SO3

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