Question

a solid has a fixed shape and a fixed volume. and it is generally hard​

Answer 1

yes the statement you have given is correct

Answer 2

Any matter that is a solid has a definite shape and a definite volume. The molecules in a solid are in fixed positions and are close together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume.