Question

(c) Kg m/s
(d) Kg
2. Which of the following are not compounds?
(a) Chlorine gas
(b) Carbon dioxide
(c) Water
(d) Iron Sulphide
3. Name the disease caused by protozoa.
SECTION -B
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Answer 1

Answer:

• Chlorine Gas is 17th Group Element of Periodic Table called Halogens.

• Chlorine is a gas that forms diatomic molecules. This means that two chlorine atoms join together to form Cl2.Chlorine is very reactive and, as a result, is not found in its free form in nature, but only in compounds with other elements.