Question

# The chemical formula of ice is:A. ${{\text{O}}_{\text{2}}}$B. ${{\text{H}}_{\text{2}}}\text{O}$C. ${{\text{N}}_{\text{2}}}$D. ${{\text{H}}_{\text{2}}}$

Hint: Recall what everyday chemical ice is a form of. Think about whether the conversion of water to ice is a chemical change or a physical change.

Let us start with the question of what ice is. Ice is a frozen form of water. The change of water to ice is a physical change. We know that when a physical change occurs in a substance, it does not affect the chemical formula and is reversible. Thus, ice will have the same chemical formula as water. We know that the chemical formula of water is ${{H}_{2}}O$.

Hence, the answer to this question is ‘B. ${{H}_{2}}O$’

- Water formed by the protium isotope will be denoted as ${{H}_{2}}O$, it is essential for the living, survival, and homeostasis of all living organisms.
- Water formed by the deuterium isotope will be denoted as ${{D}_{2}}O$ and is called heavy water. It does not have any immediate or life-threatening side effects, but consuming it in considerable amounts will lead to dizziness as the density will increase due to increased atomic weight.
- Water formed by the tritium isotope will be denoted as ${{T}_{2}}O$ and is called super-heavy water. It is a radioactive isotope and may cause mutations in the genes.