Question

Identify the correct statements from the following.
(a) Silicones are used in surgical and cosmetic plants.
(b) $C{O}_2\text{(g)}$ causes greenhouse effect.
(c) Quartz is extensively used as piezoelectric material.
(d) Carbon atoms in fullerenes are $s{p}^2$ and $s{p}^3$ hybridised.

• A. (a) and (c) only
• B. (b) and (c) only
• C. (c) and (d) only
• D. (a), (b) and (c) only

Answer 1

The correct option is D (a), (b) and (c) only

(i) In fullerenes, all the carbon atoms are $s{p}^2$ hybridised.
(ii) Silicones are inert therefore used in surgical and cosmetic plants.
(iii) Quartz crystal shows piezoelectric effect.
(iv) $C{O}_2$ is a major contributor in global warming due to greenhouse effect.