This table has the melting and boiling point for a range of substances.Identify which two substances would be a liquid at 250 °C.Aluminium & PhosphorusWater & MercuryPhosphorus & WaterMercury & Phosphorus

The melting point of two unknown substances are compared. One of the substances is thought to be an alkali metal and the other is a transition metal.The melting point of substance A is 1495 °C. The melting point of substance B is 98 °C.Predict which substance, A or B, is the transition metal.

The melting points and boiling points of some elements are given below. Classify their states – solid, liquid or gas – at room temperature (25°C). For an extra challenge, work out their states at 2000°C.ElementMelting point (°C)Boiling point (°C)State at room temperature (25°C)State at 2000°Chelium-272-269gasgasiron15382861bromine-759boron20774000mercury-39357aluminium6602519fluorine-220-188

Which alcohol in the table is liquid over the greatest temperature range?

Substance X has a melting point of 63 °C and a boiling point of 171 °C.Suggest the melting and boiling point of an impure sample of substance X.Melting point of impure substance XBoiling point of impure substance XPossible Answers171 °C63 °C57 °C183 °CI DON'T KNOWRESETSUBMIT ANSWER

Identify which liquid will have a higher vapour pressure at 90°C if the boiling points of twoliquids A and B are 140°C and 180°C, respectively