question_answer

Properties of substances W, X, Y and Z are listed below:

W: A liquid metal

X: A liquid non-metal

Y: Gaseous non-metal

Z: A non-metal which conducts electricity.

W, X, Y and Z are respectively

A) Iron, iodine, hydrogen and oxygen

B) Gold, sulphur, chlorine and hydrogen

C) Copper, phosphorus, nitrogen and carbon

D) Mercury, bromine, oxygen and graphite.