O/N 2021/P11/Q36
The structure of compound X is shown.
Four statements are made about compound X.
1 X burns in air to form carbon dioxide and water.
2 X turns bromine water from colourless to brown.
3 X is propene.
4 The number of C–C single bonds is increased by reacting X with hydrogen.
Which statements are correct?
A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
Answer: D
Explaination
Alkanes are saturated hydrocarbons because of C-C single bond. There viscosity increases down the series as the C chain grows longer and heavier. Alkanes react with chlorine or bromine in substitution reaction not in addition reaction. As their general formula is CnH2n+2 so here for C35H72 we put n=35 to get the correct answer like this:
CnH2n+2
C(35)H2(35)+2 = C35H72
