Find the odd one out of the following and explain your choice:
(a) Sulphur, Phosphorus, Carbon, Iodine
(b) Copper, Lead, Zinc, Mercury
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Solution
(a) Iodine is the only non-metal that has a metallic lustre while others are non-lustrous.
(b) Mercury is the only metal that is in the liquid state at room temperature while others are solids.