Question 13 : A substance which ionises to produce hydroxide ions is called __________.
None of the above
Question 14 : A chief source of benzene and its derivatives is __________.
Question 15 : A chief source of benzene and its derivatives is __________.
Question 16 : A functional group that introduces polarity leads to __________ in the molecule.
increase saturation point
Permanent dipole moment
increase melting point
increase boiling point
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