Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Hydrocarbons

Short Answer Type

51.

State Huckel's rule.

848 Views

52.

Name three heterocyclic compounds which are aromatic in nature.

124 Views

53.

Will cyclo-octatetraene show aromatic character?

106 Views

54.
Cyclobutadiene is not aromatic. Explain.

Cyclobutadiene (C₄H₄) is not aromatic because:
(i) It is not coplanar. It is envelope shaped.
(ii) It has only four -electrons and does not fulfil Huckel’s rule.

134 Views

55.

what are annulenes? Give one example.

161 Views

56.

Which of the following exhibits aromaticity:
(i) Cyclo - octatetraene (ii) Cyclopentadiene (iii) Tropylium cation?

136 Views

57.

Give two examples of ions which are non-aromatic. Why don't they exhibit aromaticity?

92 Views

58.

Is benzene same as 1, 3, 5-cyclohexatriene?

162 Views

59.

What is the role of catalyst in electrophilic substitution reactions?

244 Views

60.

Name the catalysts used in electrophilic aromatic substitution reactions.

107 Views

Previous Year Papers

Test Series

Test Yourself

Short Answer Type

54. Cyclobutadiene is not aromatic. Explain.

54.
Cyclobutadiene is not aromatic. Explain.