Question

3. Which of the following metals and non-metals are solid at room temperature?
a) Magnesium, Iron, Aluminium - Phosphorus, carbon and Sulphur
b) Mercury, Sodium, Potassium -- Nitrogen, Chlorine and oxygen
c) Copper, Silver, Aluminium-- Bromine, Iodine, and Hydrogen.
d) None of these.​

Answer 1

The answer is Option (a).

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