The density of water is greater than that of ice because of

Which of the following is the best scientific method to test the presence of water in a liquid?

Describe the physical properties of water.

The $INCORRECT$ statement$(s)$ about heavy water is (are):
$(A)$ Used as a moderator in nuclear reactor.
$(B)$ Obtained as a by-product in fertilizer industry.
$(C)$ Used for the study of reaction mechanism.
$(D)$ Has a higher dielectric constant than water.
Choose the correct answer from the options given below:

Explain: Proton $(H^{+})$ does not exist in aqueous solution.

Lime or $CaCl_2$ is added to water to remove which of the following impurities?