P, Q, R and S are organic compounds.
P is formed by reacting ethene with steam.
Q decolourises bromine water.
R is a hydrocarbon; all of its bonds are single covalent bonds.
S is a waste product from digestion in animals.
Which compounds are alkanes?
1 )
P and Q
2 )
P and S
3 )
Q and R
R and S
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