Assertion : Oil will form a film on the top of the water affecting the amount of light entering the water.
Reason : Oil is a polar molecule, and forms hydrogen bonds.

Assertion : Phenol has lower boiling point then water Reason : Water forms more number of hydrogen bonds

Why does oil form a thin film over the surface of water?

Assertion : The nearly tetrahedral arrangement of the orbitals about the oxygen atoms allows each water molecule to form hydrogen bonds with as many as four neighbouring water molecules. Reason : In ice each water molecules forms four hydrogen bonds as each molecules is fixed in the space.

The hydrogen bond is formed between two different polar molecules is called ______ hydrogen bonding.

Assertion : The nearly tetrahedral arrangement of the orbitals about the oxygen atom allows each water molecules to form hydrogen bonds with as many as four neighbouring water molecules. Reason: In ice each molecule forms four hydrogen bonds as each molecule is fixed in the space.

Assertion : In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason : Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

Assertion: Oil spreads on cold water . Reason : The surface tension of oil is graater than that of cold water .