Which of the following metal exists in the liquid state?

84 Which one of the following four metals would be displaced from the solution of its salt by the other three metals? 85 An element is soft and can be cut with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be: 87 Which of the following non-metal is a liquid? 88 Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?