1. The portion left on dropping a hydrogen atom from an alkane is called

2. The functional group present in a carboxylic acid is

3. Identify the unsaturated compounds from the following:

4. Which of the following are correct structural isomers of butane?

5. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e. g. , hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

6. Which of the following statements are usually correct for carbon compounds? These

7. How many electrons are there in the outermost orbit of carbon?

8. Which of these is true for most of the organic compounds?

9. Hydrocarbons are mainly composed of which of these?

10. How many double bonds are there in a saturated hydrocarbon?