Any three applications of neutralization reactions are:
i. Farmers use lime to neutralize the acidity of soil.
ii. We can neutralize formic acid by using soap.
iii. Acetic acid is used to neutralize the acid injected by the bumble bee in our skin.

i. Boric acid: Washing eyes and wounds.
ii. Nitric acid: Making explosives, plastics and dyes.
iii. Tartaric acid: Used in baking powder.
iv. Sodium hydroxide: Making soap, detergents, paper, etc.
v. Calcium oxide: Softening hardwater, purifying sugar, etc.
vi. Calcium sulphate: plastering fractured bones.
vii. Aluminium chloride: Used in dry cell as an electrolyte.
viii. Zinc sulphate: Making pigment in eyes.

i. Hcl + KoH ----------> H₂O + Kcl
ii. 2KoH + H₂SO₄ -----------> K₂SO₄ + 2H₂O
iii. CuO + H₂SO₄ ----------> CuSO₄ + H₂O
iv. 2NaOH + H₂SO₄ ---------> Na₂SO₄ + 2H₂O
v. H₂SO₄ + Cu(OH)₂ ---------> CuSO₄ + 2H₂O

We know, sodium hydroxide is an alkali which produces high concentration of hydroxyl ions in a solution but ammonium hydroxide produces low concentration. So, sodium hydroxide is a stronger and ammonium hydroxide is a weak base.

Bases are those substances which may or mayn't dissolve in water but alkalis are the bases which are dissolved in water. Insoluble bases are not alkalis. Therefore we can say that, all alkalis are bases but all bases are not alkalis.

Sodium bicarbonate is formed by partial displacement of hydrogen atoms of the acid. So, sodium bicarbonate is an acid salt.

Any three properties of salts are:
i. Salt are water soluble and insoluble both.
ii. Salts are amorphous and crystalline both.
iii. Salt are electrovalent compounds.

Salt is a chemical substance which is formed by partial or complete replacement of hydrogen ions of and acid by a metal or ammonium radical.
i. By direct combination of metal and non-metals.
ii. By the reaction of metals with acids.

The major uses of base are:
i. It is used to make soap, detergent, etc.
ii. It is used to make bleaching powder.
iii. It is used to remove grease and stain from clothes.
iv. It is used for softening hard water.
v. It is used for purification of sugar and production of cements.

The process of mixing base and acids together to lose their properties and neutralize the substance is meant by neutralization reaction.
Example: Hcl + NaOH ---------> Nacl + H₂O

Any two chemical properties of base wit chemical rxⁿ are:
i. Alkalis react with acid to form salt and water.
NaOH + Hcl --------> Nacl + H₂O
ii. Alkalis librate ammonia from ammonium salts.
NaOH + NH₄Cl ----------> Nacl + H₂O + NH₃

Any two physical properties of alkalis are:
i. They are soapy in touch and bitter in taste.
ii. Strong base or alkalis burn our skin.

We know, acids are acidic in nature but base are basic in nature. Acids contains hydrogen ions (H⁺) which stimulate the taste buds that detect sour taste. Bases contain (OH^-)ions which stimulate the taste buds that detects bitter taste. Therefore, acids are sour in taste but bases are bitter.

The uses of common salts are:
i. It is used in our food as preservative.
ii. It is used to reduce the hardness of water.
iii. It is used for plastering the fractured bones.
iv. It is used in chemical fertilizer.
v. It is used in dry cell as electrolyte.
vi. It is used to make white pigments of eyes.

The base that dissolve in water and produce hydroxyl (Oh^-) ions are called alkalis.
For example: NaOH, KOH, etc.

Metallic oxides or hydroxides are called base. In broader sense, base are oxide of metals or hydrogen that are basic in nature.
For eg. PbO, CuO, etc.

We bring acids in domestic use by following way:
i. It is used for preserving and flavoring foods.
ii. It is used for washing eyes and wounds.
iii. It is used in soft drink and soda water.
iv. It is used to make pickle.
v. It is used in medicine as the source of vitamin C.

Any three uses of acids are listed below:
i. It is used in industries and laboratories.
ii. It is used to kill germs.
iii. It is used in baking powder.

Any two chemical properties of acids with balanced chemical eqn. are:
i. It reacts with base to produce salt and water.
Hcl + NaOH -------->Nacl + H₂O
ii. It dissolve in water and give hydrogen ions.
Hcl --------->H⁺ + cl^-

Two properties of acids are listed below:
i. It taste sour.
ii. It is corrosive in nature.
iii. It changes blue litmus paper to red and methyl orange to red.

Acids which are obtained from living organisms and have hydrocarbons are called organic acids.
For eg.Acetic acid(CH₃COOH), Formic acid(HCOOH)

Acids which are obtained from minerals and do not have hydrocarbons are called inorganic acids.
For eg. Hydrochloric acid(Hcl), Sulphuric acid(H₂SO₄)

Acids which undergo almost complete dissociation in aqueous solution and produce high concentration of hydrogen ions is called strong acids.
For eg.Hcl, H₂SO₄.

Acids that undergo partial dissociation in aqueous solution and produce less concentration of hydrogen ions is called weak acids.
For eg.Carbonic acid(H₂CO₃), Formic acid(HCOOH)

Acids are those chemical substances that gives hydrogen ions when dissolved in water.

For example: HCl -----> H⁺ + Cl^-
H2SO4 -----> 2H⁺ + SO4^--