Q14 of 56 Page 118

The correct electron dot structure of a water molecule is:

Oxygen forms single covalent bonds with hydrogen. Having 6 valence electrons, 2 of them contribute to the covalent bond. After bond formation oxygen would have 2 shared pairs of electrons and 2 lone pairs of electrons.

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12

Chlorine reacts with saturated hydrocarbons at room temperature in the:

 13

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:

 15

Which of the following is not a straight chain hydrocarbon?

 16

Which among the following are unsaturated hydrocarbons?

(i) H3C — CH2 — CH2 — CH3


(ii) H3C — C ≡ C — CH3


(iii)


(iv)