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.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

A

Explanation

Both assertion & reason are true & reason is the correct explanation of the assertion because. At any given instant, at room temperature each water molecules forms hydrogen bonds with other water molecules. The `H_2O` molecules are in continuous motion. So hydrogen bonds are constantly & rapidly broken & formed. In Ice `H_2O` molecules are however fixed in the space lattice.