Water

During the decomposition of water, the volume of Hydrogen collected is _______ the volume of Oxygen.

Which of these is a gaseous form of water found in the atmosphere?

Approximately what percentage of the human body is composed of water?

The components of water are held together by ________ bonds.

A student performs the electrolysis of two different volumes of pure water as part of a science experiment. Sample 1 is $50\text{ ml}$ and Sample 2 is $500\text{ ml}$. If Sample 1 produces Hydrogen and Oxygen in a volume ratio of $2:1$, what will be the volume ratio $X$ for the gases obtained from Sample 2?

What is the valency of Hydrogen in the compound $H_{2}O$?

During the electrolysis of water, the gas that makes a 'pop' sound is collected at which electrode?

If you perform electrolysis on $100\text{ ml}$ of water, how much water will remain after $20\text{ ml}$ of Oxygen gas has been produced (Assume density of water is $1\text{ g/ml}$ and ignore gas density)?

What is the ratio of the number of atoms of Hydrogen to Oxygen in $5$ molecules of water?

When $2$ volumes of Hydrogen react with $1$ volume of Oxygen, how many volumes of steam are produced (at the same temperature and pressure)?

The taste of drinking water is mainly due to:

Which gas dissolved in water is used by aquatic plants for photosynthesis?

What does the '2' represent in the chemical formula $H_{2}O$?

A substance that contains no water of crystallization is called:

Which of the following is true regarding 'Soft Water'?

Which of the following describes the behavior of water between $0^{\circ}C$ and $4^{\circ}C$?

In the context of solutions, what does 'concentration' refer to?

The solubility of Potassium Chloride at $20^{\circ}C$ is $34 \, g/100 \, g$ of water. If a solution contains $17 \, g$ of $KCl$ in $50 \, g$ of water at $20^{\circ}C$, the solution is:

The process of removing water of crystallization from a hydrated salt by heating it is called:

Calgon, used for water softening, is a trade name for:

What is the term for the component that gets dissolved in a solvent to form a solution?

What is the name of the process when a substance loses its moisture or water of crystallization?

If you keep adding salt to a fixed amount of water and it stops dissolving at room temperature, the solution has become:

Which of these substances is most likely to be the solute in a solution of 'Tincture of Iodine'?

Which of the following is a non-aqueous solution?

Why do aquatic animals feel more comfortable in cold water than in warm water?

If you have a saturated solution at $50^{\circ}C$ and you cool it to $20^{\circ}C$, the excess solute that comes out of the solution is called the:

Why does rain water, which is naturally pure, become 'hard' as it flows over the ground?

Which of the following salts exhibits 'Water of Crystallization'?

In the distillation process, the water collected in the receiver after condensation is called:

Which step in a municipal water treatment plant is designed to remove very small suspended particles that did not settle during sedimentation?

Pure water is which of the following?

Detergents contain which of the following that can lead to water pollution?

Which of the following is a symptom of water being contaminated with oil?

If you are on a camping trip and the only water source is a stream, what is the most reliable way to make the water safe from biological pathogens?

Which of these is a benefit of using a 'Septic Tank' system?

In the process of water treatment, what is the 'Clarifier'?

In the process of water treatment, why is 'Slow Sand Filtration' considered more effective than simple screening for removing pathogens?

Which process in tertiary treatment involves the use of semi-permeable membranes to remove even the smallest dissolved ions from water?

If a lake has a very high 'Turbidity' value, which of the following is the most likely consequence for the benthic (bottom-dwelling) community?