Question

IF THE CONSTITUENT PARTICLES OF ICE ARE CLOSELY PACKED THEN HOW DOES THE STUDY MATERIAL OF MERITNATION SAYS THAT ICE HAS LARGE SPACES BETWEEN ITS PARTICLES AS COMPARED TO WATER PARTICLES.

Answer 1

Constituent particles of the ice are not closely packed. In the ice water remains in the solid form in which each water molecule is tetrahedrally surrounded by the four other neighboring water molecules with their oxygen atom occupying the corner of the tetrahedron.

There are four hydrogen atoms two of the hydrogen atoms are bonded by the covalent bond while another two by the hydrogen bond. This gives a huge 3D structure having large vacant spaces. Due to this it has a large volume for the given mass of the water and hence less density.