CBSE Class 12 Chemistry Haloalkanes and Haloarenes Quiz 1

1. Good conductor of electricity and heat is

A Anthracite coke B Diamond C Graphite D Charcoal

2. In which of the following allotropes of carbon, percentage of carbon is maximum?

A Wood charcoal B Coconut charcoal C Graphite D None of these

3. The hybridisation of carbon in diamond is

A sp B sp C sp D dsp

4. Organic compound must contain an element

A oxygen B carbon C hydrogen D nitrogen

5. Alkene gives which of the following reactions?

A Addition reaction B Substitution reaction C Both (a) and (b) D None of these

6. Single bond length between carbon-carbon is

A 1.34 Å B 1.20 Å C 1.54 Å D none of these

7. Valency of carbon is

A 1 B 2 C 3 D 4

8. Criteria for purity of organic solid is

A boiling point B melting point C specific gravity D none of these

9. Hybridisation of carbon in ethane is

A sp B sp C sp D sp

10. Number of π bonds in ethyne is

A 1 B 2 C 3 D 4