Question 2
Metals are solid at ordinary temperature. Which metal is the exception?
The right answer is the one marked above.
Mercury. It is a metal, but at ordinary temperature it is a liquid.
Bromine is liquid at ordinary temperature too — but bromine is a non-metal, so it is not an exception to anything; non-metals come in all three states. The exception is a metal that is not solid, and mercury is the one.