Question

Following substance rigidity property is present. Aluminium, ice, chalk and naphthalene balls

Answer 1

Out of the given substance, the substance which can offers the property of rigidity is Al.

Rigidity is property to maintain its shape, also Al is metal to it has property of rigidity, while all can easily change their shape and state.

Answer 2

Out of the given substance, the substance which basically offers the property of rigidity is Aluminium.

Rigidity is the main property to maintain its shape, and also Al is a metal to that has property of rigidity, while all can easily change their shape and state.

So, the answer is aluminium.