Name two metals which are found in nature in the free state.
What would you observe when zinc is added to a solution of iron $(II) $ sulphate ? Write the chemical reaction that takes place.
Give an example of a metal which
$(i)$ is a liquid at room temperature.
$(ii)$ can be easily cut with a knife.
$(iii)$ is the best conductor of heat.
$(iv)$ is a poor conduct of heat.
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
Give reasons : Sodium, potassium and lithium are stored under oil.