Explanation

Argon is a commonly used gas used to fill incandescent light bulbs.

It increases bulb life by preventing the tungsten filaments from deteriorating too quickly.

Other gases are also used in lighting such as:

• Helium
• Neon
• Nitrogen
• Krypton

Explanation

Deaeration removes dissolved gases (mainly oxygen and carbon dioxide) from water.

It prevents corrosion in boilers and pipelines.

Explanation

Natural Gas Liquids (NGLs) are hydrocarbon compounds separated from natural gas.

They include ethane, propane, butane, and pentane.

Explanation

Mustard gas (sulfur mustard) is a viscous liquid at room temperature with a relatively high boiling point.

It was used as a chemical warfare agent because it evaporates slowly, making it effective over time.

Explanation

Helium  and Argon is a noble gas, part of Group 18 in the periodic table.

Helium (He)

The lightest noble gas, helium is used in hot air balloons and airships.

It's also used in air containers for deep-sea divers.

Argon (Ar)

Argon makes up 0.93% of the Earth's atmosphere.

It can be prepared by fractional distillation of liquid air.

Explanation

Chlorine is a yellow-green poisonous gas at room temperature.

Thorium and Plutonium are solids.

Mercury is a liquid at room temperature.

Explanation

Methane is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms).

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Explanation

• If the pH value is greater than 7, the solution is basic (also known as alkaline).
• This means that the concentration of hydroxide ions (OH-) is higher than the concentration of hydrogen ions (H+).

Key Points:

• pH < 7: Acidic
• pH = 7: Neutral
• pH > 7: Basic (or alkaline)

Explanation

Gases can dissolve in water.

The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules.

Oxygen, Carbon dioxide, and Nitrogen are mostly soluble gases in water.

Explanation

Gas molecules move in random directions with high speed and energy.

This random motion leads to collisions with each other and the container walls.