Which one of the following four metals would be displaced from the solution of its salt by the other three metals?

82 An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be : 83 An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: 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: 86 Which of the following metal exists in the liquid state?