Sodium salt of which acid will be needed for the preparation of propane? Write chemical equation for the reaction.

On converting benzene to toluene, state whether there will be a rise or fall in the melting point.

Why do you alkenes prefer to undergo electrophilic addition reaction while arenes prefer electrophilic substitution reactions? Explain.

What effect does branching of an alkane chain has on its boiling point?

Suggest the name of another Lewis acid instead of anhydrous aluminium chloride which can be used during ethylation of benzene.

Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?

What are the necessary conditions for any system to be aromatic?

Write structures of all the alkenes which on hydrogenation give 2-methylbutane.

Which of the following compounds will show cis-trans isomerism?
(CH₃)₂C=CH-C₂H₅

Which of the following compounds will show cis-trans isomerism?
CH₂= CBr₂

Write chemical equations for combustion reaction of the following hydrocarbons:
(i) Butane
(ii) Pentene
(iii) Hexyne
(iv) Toluene

Write IUPAC names of the products obtained by the ozonolysis of the following compounds :
(i) Pent-2-ene
(ii) 3,4-Dimethylhept-3-ene
(iii) 2-Ethylbut-1-ene
(iv) 1-Phenylbut-1-ene

Addition of HBr to propene yields 2-bromopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism.

How would you convert the following compounds into benzene?
(i) Ethyne
(ii) Ethene
(iii) Hexane