Sulphur element is said to be:

An element is soft and can be cut easily with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water. This element is most likely to be:

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

An element Z reacts with water to form a solution which turns phenolphthalein indicator pink. The element X is most likely to be:

The non-metal which exists in the liquid state at room temperature is: