What is aromatisation of gasoline? Illustrate giving appropriate reactions.

riefly explain Kolbe’s electrolytic method for the synthesis of alkanes. 

Briefly explain the mechanism of β-eliminatio

 Differentiate between the basicity and nucleophilicity giving suitable examples

Explain the relative stability of the following carbocations:

(i) methyl carbocation

(ii) a tertiary carbocation

(iii) a primary carbocation

(iv) a secondary carbocation

Draw the energy profile for various confirmations exhibited by cyclohexane. Also explain the relative energies of various conformations.

Give example of a meso compound. Also comment on its optical activity giving reason. 

 Assign R/S configuration to the following compound:

Also give the steps involved.

) How will you distinguish maleic acid and fumaric acid?

(a) Assign the E or Z configuration to the following molecule giving the steps involved: 

Calculate the bond order of  molecule from its molecular orbital configuration.

Draw p_y-p_y combination of atomic orbitals to give the suitable molecular orbitals.

) 

Write the resonance structures of dimethylsulphone.

 Compare the characteristics of ionic and covalent compounds.

) What is electronegativity? Arrange the following in the decreasing order of their electronegativities: K, F and I.

State and illustrate Fajan’s rules giving suitable examples.

Give any two examples of atoms showing anomalous electronic configurations.