Subject Experts Solutions for Chapter: Water, Exercise 2: PRACTICE QUESTIONS (COMPETITION WING)

Two persons $\mathrm{A}$ and $\mathrm{B}$ got burns, one with boiling water at $100 °\mathrm{C}$ and other due to steam at $100 °\mathrm{C}$, respectively. Which person is affected more?

Aquatic animals are able to survive in water bodies like rivers and oceans during winter when the atmospheric temperature is$-10 °\mathrm{C}$. This is because: 

Which of the following elements is used for the purification of surface water to make free from germs so that it can be used for drinking purpose?

Which of the following is the application of the highest specific heat capacity of water?

Water containing salt $\mathrm{X}$ of a divalent metal, when treated with compound $\mathrm{Y}$ gives much lather soap. Insoluble compounds ${\mathrm{MgCO}}_3$ and salt of a monovalent metal sulphate are formed. Identify $\mathrm{X}$ and $\mathrm{Y}$ respectively.

The amount of energy required to increase the temperature of $\mathrm{X} \mathrm{g}$ of water by $10 °\mathrm{C}$ is found to be $15 \mathrm{cal}$. Calculate $\mathrm{X}$.

The water obtained by ion-exhange process is:

Which among the following is based on the principle that boiling point decreases with the decrease in atmospheric pressure?