WorksheetsMacromolecule (Giant Molecular Structure)
Total questions: 11
Worksheet time: 22mins
Diamond and graphite are macromolecules.
Which statement about diamond and graphite is not correct?
They are giant structures with high melting point
They are non-conductors of electricity
They only contains atoms of a non-metal
They have covalent bonds between the atoms
Two statements about diamond are given.
1 Diamond has a giant three-dimensional covalent structure of carbon atoms
2 Diamond is one the hardest substance known
Which is correct?
Both statements are correct and statement 1 explains statement 2
Statement 1 is correct but statement 2 is incorrect
Statement 2 is correct but statement 1 is incorrect
The 'lead' in a pencil is made of a mixture of graphite and clay.
When the percentage of graphite is increased, the pencil slides across the paper more easily.
Which statement explains this observation?
Graphite has a high melting point
Graphite is a form of carbon
Graphite is a lubricant
Graphite is a non-metal
Which of the following does not have a giant structure?
Diamond
Graphite
Iodine
Silicon dioxide
Which statement about different forms of carbon is correct?
Graphite and diamond conduct electricity
Graphite conducts electricity but diamond does not
Diamond conduct electricity but graphite does not
Which statement best explains why diamond has a high melting point?
It has strong covalent bonds
A large amount of energy is needed to break its strong covalent bonds
A large amount of energy is needed to break its bonds
Which of the following has a giant covalent structure?
carbon dioxide
magnesium oxide
silicon dioxide
Why does silicon dioxide have such a high melting point?
Because the silicon and oxygen atoms are held by strong intermolecular forces
Because the silicon and oxygen atoms are held by many strong covalent bonds
Because there are strong electrostatic forces between the silicon and oxygen atoms
Why is graphite useful for pencil leads?
It is hard with a high melting point
It is black and slippery
It is shiny and melts easily
What type of structure do both diamond and graphite have?
A giant covalent structure
A giant ionic lattice structure
A simple molecular structure
Why does graphite conduct electricity?
It has delocalised electrons
It has a giant covalent structure
It forms a tetrahedral arrangement
