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WorksheetsTopic 5 Group 14
Total questions: 10
Worksheet time: 6mins
Which of the following statements about carbon is not correct?
All carbon compounds are covalent.
The most stable oxidation state of carbon is +4.
Carbon has simple covalent structure.
Diamond is an allotrope of carbon.
Which of the following statements about Group 14 is true?
The +4 oxidation state become more stable going down Group 14.
The melting point increases going down Group 14.
The boiling points of Group 14 tetrachlorides increases going down the group.
Conductivity of Group 14 elements decreases going down the group.
Tin(II) chloride decolourises an acidified solution of potassium manganate(VII). Which of the following statements best explained about this reaction.
Tin(II) chloride is a powerful oxidising agent.
Tin(II) is unstable.
Tin(II) is more stable than Tin(IV)
Potassium manganate(VII) is a powerful oxidising agent.
In diamond, each carbon atom has connected to how many carbon atoms?
4
3
6
8
Why PbCl4 forms greenish yellow fumes when heated but CCl4 does not form any fumes?
Carbon is less stable with +4 oxidation state.
PbCl4 is very reactive
Colourless fumes produced by CCl4 is difficult to be observed.
Pb is more stable in +2 oxidation state.
Silicon(IV) oxide
is an ionic compound with strong electrostatic force
has weak van der Waals forces between molecules
has giant layered structure
has high lattice energy
Diamond is a non-conductor because
diamond has no valence electrons
diamond is very hard
diamond does not have delocalised electrons
diamond has tetrahedral shape
State the similarity between graphite and diamond?
They have giant molecular structure
Valence electrons are delocalised
The atoms are bonded in tetrahedral shape
Both can conduct electricity
Boiling point of
Sn is higher than Pb
C is lower than Ge
Pb is higher than Si
C is highest, followed by Si, Ge, Pb and Sn
The following properties is the reason for the use of diamond in high speed drilling materials except for
diamond is hard
diamond has giant covalent structure
diamond has layered structure with van der Waals forces
diamond has strong covalent bonds
