Question 1
Which substance has the lowest melting point?
A
graphite
B
methanol
C
silicon(IV) oxide
D
sodium chloride
Question 2
[Maximum number: 1]
How many electrons are shared in one molecule of nitrogen and in one molecule of ethene?
nitrogen
ethene
2
12
2
8
6
12
6
8
C
Question 3
[Maximum number: 1]
Which statement describes the attractive forces between molecules?
A
They are strong covalent bonds which hold molecules together.
B
They are strong ionic bonds which hold molecules together.
C
They are weak forces formed between covalently-bonded molecules.
D
They are weak forces which hold ions together in a lattice.
C
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