How do you account for the formation of ethane during chlorination of methane ?

3

(a)

For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated :
(a) C₄H₈ (one double bond)
(b) C₅H₈ (one triple bond)

3

(a)

An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.

3

(a)

Why is benzene extra ordinarily stable though it contains three double bonds?

3

(a)

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

3

(a)

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

3

(a)

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

3

(a)

Why is Wurtz reaction not preferred for preparation of alkanes containing odd number of carbon atoms? Illustrate your answer by taking one example.

3

(a)

Define resonance energy. What is resonance energy of benzene?

3

(a)

Discuss the shape of methane and ethane.

3

(a)

Classify the following compounds into (i) alkanes (ii) alkenes (iii) alkynes (iv) arenes.
(a) C₆ H₆
(b) C₄H₈
(c) C₈H₁₈
(d) C₅H₈
(e) C₆H₁₄

3

(a)

What is polymerization? Give an example.

3

(a)

(a) What effect the branching of an alkane has on its melting point?
(b) Which of the following has highest boiling point?
(i) 2-methyl pentane
(ii) 2, 3-diethyl butane
(iii) 2, 2-dimethyl butane

3

(a)

How will you convert ethanoic acid into ethene?

3

(a)