Question
Chlorine : Fluorine : Iodine
Options:
A .  These are halogens.
B .  These are names of inert gases.
C .  These are transition elements.
D .  These are gases at room temperature.
Answer: Option A
Answer: (a)Halogens are any five chemical substances that are not metals and that combines with hydrogen to form strong acid compounds from which simple salts can be made.

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