Question 9 : All these affect boiling points except __________.
Shape of molecule
London forces
Polarity
Molecular structure
Question 10 : A chief source of benzene and its derivatives is __________.
Bitumen
Coaltar
Limestone
Basalt
Question 11 : In electrophilic addition to alkenes, the electrophilic attack is on ---------.
C-H bond
None of the above
C=C bond
H-H bond
Question 12 : A benzenoid hydrocarbon in which two benzene rings are fused together at the ortho position is called ----------. <
Naphthalene
Biphenyl
Anthracene
Phenanthrene
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