Question

give reasons (d)we should easily move our hand in air but to do same through a solid block it is not possible why

Answer 1

It is because in air the particles are loosely packed and there are large inter molecular spaces between them and the inter molecular forces are very low which allows us to move our hand in air. Whereas in solids the particles are tightly packed that there are no inter molecular spaces and the inter molecular forces are high which is difficult to do the same.

Answer 2

We move hand through air because there are spaces between them and there are no Space between the particles of solid