Question

we can move our hand in air but not in solid ice

Answer 1

we can move our hand freely in air but not through solid block of wood as the molecules of air have least force of attraction hence the molecules move freely but in solids the molecules are tightly packed with high force of attraction 

Answer 2

we can move our hand freely in air but not through solid block of wood as the molecules of air have least force of attraction hence the molecules move freely but in solids the molecules are tightly packed

Hope this will help you