Identify the odd one out and justify.

A. Chloride, nitrate, hydride, ammonium

B. Hydrogen chloride, sodium hydroxide, calcium oxide, ammonia

C. Acetic acid, carbonic acid, hydrochloric acid, nitric acid

D. Ammonium chloride, sodium chloride, potassium nitrate, sodium sulphate

E. Sodium nitrate, sodium carbonate, sodium sulphate, sodium chloride

F. Calcium oxide, magnesium oxide, zinc oxide, sodium oxide.

G. Crystalline blue vitriol, crystalline common salt, crystalline ferrous sulphate, crystalline sodium carbonate.

H. Sodium chloride, potassium hydroxide, acetic acid, sodium acetate.

A. The odd one(s) – ammonium

Explanation: Ammonium(NH₄⁺) is the odd one out because it is the only positively charged ion (cation). While chloride (Cl^-), nitrate (NO^-) and hydride (H^-) are the negatively charged ion (anion)

B. The odd one(s) – Hydrogen chloride

Explanation: Hydrogen chloride is odd one out because it is the only acid among the given compounds. While sodium hydroxide (NaOH), calcium oxide (CaO) and ammonia (NH₃) are the bases.

C. The odd one(s) – Acetic acid

Explanation: Acetic acid is odd one out because it is the only organic acid. While carbonic acid, hydrochloric acid and nitric acid are inorganic acids.

D. The odd one(s) – Ammonium chloride

Explanation: Ammonium chloride is the odd one out out

among the given compounds because it is an acidic salt. While

sodium chloride, potassium nitrate, sodium sulphate are the

neutral salts.

Note:

Acidic salts are formed by the neutralization reaction between a strong acid and a weak base.

Neutral salts are formed by the neutralization of a strong acid and a strong base.

Salts are formed by the combination of acid and base. The reaction takes place is called neutralization reaction.

E. The odd one(s) – Sodium chloride

Explanation: sodium chloride is the odd one out because it the only neutral salt present.

F. The odd one(s) – ZnO

Explanation: ZnO is odd one out because it is the only amphoteric oxides among the given oxides. While CaO, MgO and Na₂O are basic oxides.

G. The odd one(s) – Crystalline common salt

Explanation: Crystalline common salt is the odd one out

because it does not lose its crystallization on heating.

H. The odd one(s) – Potassium hydroxide

Explanation: Potassium hydroxide is odd one out because it is not salt. While all others are salts