CBSE Class 12 Chemistry Sample paper 2013 Set 06

1. Explain why the dipole moment of chloroform is lower than that of cyclohexyl chloride?

2. Which of the following 2 compounds would react faster by SN² pathway:- 1-bromobutane or 2-bromobutane and why?

3. Out of bezene and phenol which is more easily Nitrated and why?

4. Di-tert-butyl ether cannot be made by williamson’s synthesis. Explain why?

5. Identify the following name reactions and write the reagents used: CH₃CHO→ CH₃-CH₃ + H₂O

6. Fluorine is more electronegative than Chlorine even then P-Fluorobenzoic acid is weaker acid than P-Chlorobenzoic acid. State the reason for this.

7. Propanal is more reactive than propanone. Give reason.

8. Account for the following:

i) Haloalkanes undergo nucleophilic substitutions while haloarenes undergo electrophilic substitution reaction

ii) Haloalkanes react with KCN form alkylcyanides while isocyanides are formed with AgCN.

9. How the following conversions can be carried out ?

i) Toluene to benzyl alcohol ii) Ethanol to but-1-yne.

10. Write the equations of the reactions which takes place when

i) Thionyl chloride is treated with 2-propanol. ii) Cumene hydroperoxide is treated with dil. H₂SO₄.

11. When toluene is chlorinated:

i) in presence of sunlight ii) in dark, in the presence of lewis acid, two separate compounds are obtained. Explain with suitable mechanism.

12. Write the steps involved in the mechanism of acid catalysed hydration of propene

Please refer to attached file for CBSE Class 12 Chemistry Sample paper 2013 Set F