Explanation

• Distillation is a process that removes dissolved physical and chemical impurities from water.
• By boiling the water and then collecting the condensed steam, which is free from many impurities.

Explanation

• Chlorination is the process of adding disinfectants, such as chlorine, to water to kill harmful microorganisms.
• It prevent the spread of waterborne diseases.

Explanation

• Filtration is a process that removes suspended sand particles and insoluble physical impurities from water.
• By passing it through a filter medium, such as sand, gravel, or a membrane.

Explanation

The substance used to absorb carbon dioxide gas in combustion analysis is 50% KOH (potassium hydroxide)

50% KOH (potassium hydroxide):

Potassium hydroxide is used to absorb CO (_2) because it reacts with CO (_2) to form potassium carbonate (K(_2 )CO (_3) and potassium bicarbonate (KHCO (_3)).

This makes it an effective absorbent for CO(_2) in combustion analysis.

[ 2KOH + CO_2 rightarrow K_2CO_3 + H_2O ]

 [ KOH + CO_2 rightarrow KHCO_3 ]

Explanation

The term "phosphatidylcholine" is sometimes used interchangeably with "lecithin," although the two are different.

Choline is a component of phosphatidylcholine, which is a component of lecithin.

Explanation

In 1935, the Tobacco mosaic virus (TMV) was crystallized by Wendell Meredith Stanley.

Stanley's work on TMV contributed significantly to the understanding of viruses

He earned him the Nobel Prize in Chemistry in 1946

Explanation

The angle through which plane-polarized light is rotated by a reacting mixture is measured by the optical rotation method.

Optical rotation, also known as optical activity, is a property exhibited by certain substances

That causes them to rotate the plane of polarized light passing through them

This rotation is quantified by measuring the angle of rotation, typically using a polarimeter

Explanation

Compounds that have a small value of K have an affinity for the stationary phase.

Explanation

The molecule that exhibits all three types of bonding—ionic, covalent, and coordinate covalent—is NH4Cl (ammonium chloride).

Ionic Bonding:

In NH4Cl, the bond between ammonium (NH4+) and chloride (Cl-) ions is primarily ionic.

Covalent Bonding:

Within the ammonium ion (NH4+), the bonds between nitrogen and hydrogen atoms are covalent.

Coordinate Covalent Bonding:

In NH4Cl, there is also a coordinate covalent bond between the ammonia (NH3) molecule and a proton (H+) from hydrochloric acid (HCl) that forms ammonium (NH4+)

Explanation

Two oxides of xenon are known:

• xenon trioxide (XeO3) 
• xenon tetroxide (XeO4)

They both are unstable, highly explosive solids that must be handled with the greatest care.

The oxide fluorides XeO3F2, XeO2F4, XeOF4, XeO2F2, and XeOF2 are known and, except XeOF4, all are thermodynamically unstable.