Ardingly College iGCSE Chemistry - Covalent bonding quiz 2

How many covalent bonds does carbon form in this molecule?

• 1

• 4

• 5

• 8

How many covalent bonds does each hydrogen form in this molecule?

• 1

• 4

• 5

• 8

The diagram shows the bonding in a molecule of methane.

Which statement about the bonding in methane is correct?

• Each line represents an electron

• Each line represents a bonding pair of electrons

• Each line represents a lone pair of electrons

• There are a total of 5 bonds in methane

Carbon always forms ____ bonds because it needs ____ electrons to fill its valence shell.

(a)  

• Four, Four
• Five, Three

• Two, Two

• Three, Five

• Five, five

How many double and single bonds are there in this molecule?

• Single = 7

  Double = 2

• Single = 9

  Double = 2

• Single = 7

  Double = 4

• Single = 9

  Double = 4

What is the total number of electrons in ALL the bonds in this molecule?

• 9

• 11

• 18

• 22

What is the total number of electrons contained in double bonds in this molecule?

• 2

• 4

• 8

• 16

The diagram shows a molecule of oxalic acid - the poison found in rhubarb leaves.

Which statement about oxalic acid is true?

• It contains more double bonds than single bonds

• it contains more electrons in double bonds than in single bonds

• The total number of bonding electrons is 18

• Oxalic acid contains no lone pairs of electrons

Which of the following molecules contains a triple bond?

• Oxygen (O₂)

• Nitrogen (N₂)

• Water (H₂O)

• Methane (CH₄)

Which statement about the bonding in water (H₂O) is correct?

• Each hydrogen atom forms a double bond with oxygen

• Each hydrogen atom forms a single bond with oxygen

• Oxygen forms a triple bond with each hydrogen atom

• Water contains no covalent bonds