Q22 of 60 Page 28

The correct electron dot structure of a water molecule is

Oxygen (O) has 6 valence electrons and hydrogen (H) has 1. All the 8 electrons must be arranged in pairs so that oxygen completes the octet structure (8 electrons in its valence cell). Each hydrogen has now 2 electrons in its valence shell.

More from this chapter

All 60 →
20

Mineral acids are stronger acids than carboxylic acids because

(i) mineral acids are completely ionised


(ii) carboxylic acids are completely ionised


(iii) mineral acids are partially ionised


(iv) carboxylic acids are partially ionised

 21

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

 23

Which of the following is not a straight chain hydrocarbon?

 24

Which among the following are unsaturated hydrocarbons?