When succinic acid react with ethylenediamine, it form nylon type polymers.

The repeating unit is –(-OC-CH2-CH2-CO- HN-CH2-CH2-NH-)-

A volatile substance can be defined as

(1) a substance that evaporates readily at normal temperatures .

(2) one that has a measurable vapor pressure.

The term volatile usually applies to liquids.

Molarity describes the number of moles of the substance per liter of liquid. In chemistry, a mole is a unit of measurement for a chemical substance.

 Molarity describes the concentration of a substance as measured by the number of moles divided by the volume of the solution it's in.

Denticity refers to the number of donor groups in a single ligand that bind to a central atom in a coordination complex. In many cases, only one atom in the ligand binds to the metal, so the denticity equals one, and the ligand is said to be monodentate (sometimes called unidentate).

Lucas' reagent is a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is used to classify alcohols of low molecular weight. The reaction is a substitution in which the chloride replaces a hydroxyl group.

Cllodion : A syrupy solution of nitrocellulose in a mixture of alcohol and ether, used for coating things, chiefly in surgery.

Water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.so alcohol is miscible in water.

When the signal sending capacity of nor adrenaline is not effective then it causes depression.... this can be cured by using antidepressants ... such as iproniazid which inhibits the catalytic activity of the enzyme that inhibits the activity of noradrenaline .

Stephen aldehyde synthesis, a named reaction in chemistry, was invented by Henry Stephen(OBE/MBE). This reaction involves the preparation of aldehydes (R-CHO) from nitriles (R-CN) using tin(II) chloride (SnCl₂), hydrochloric acid (HCl) and quenching the resulting iminium salt ([R-CH=NH₂]⁺Cl⁻) with water (H₂O).

The method is extensively employed for the concentration of Sulphide ores. The process is based on the principle of preferential wetting of ore particles by the oil and gangue by water.

The impure crushed ore is taken in the big tank provided the resulting mixture is agitated vigorously by passing compressed air through a perforated pipe. The ore particles are preferentially wetted by oil which rises up to the surface with froth or foam formed by the oil and air. The gangue impurities being wetted by water settle to the bottom of the tank. The foam gets transferred to the other side of the tank where it slowly subsides. It is transferred to another tank and is repeatedly washed with water to recover are particles free from impurities. Sometimes other substance known as <i>Collectors </i>are also added. These substance increases the binning properly of ore particles and foam. The commonly used collectors are <i>Ethyl Xanthate </i>and <i>Potassium Ethyl Xanthate</i>.