Which metal does not react even with hot water or steam?

An element $A$ is soft and can be cut with a knife. It is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following:

Which of the following ores is in the form of carbonate?

$A$ metal $M$ forms an oxide having the formula $M_{2}O_{3}$. It dissolves in both dilute sulphuric acid and dilute sodium hydroxide solution. Identify the metal and write the chemical equations for the reactions involved.

Which of the following pairs will give displacement reactions?

State whether the following statement is true or false:
Copper reacts vigorously with dilute $HCl$.