Ammonia is used in the manufacture of: MCQ with Answer and Explanation

Explanation:
Atomic number 17 is chlorine. Electronic configuration: 2,8,7. Period number = number of shells = 3. Group number = 10 + valence electrons (for p-block elements) = 10+7 = 17. Hence Group 17 (halogens), Period 3. Group 1 has 1 valence electron, Group 16 has 6, Group 18 has 8 (except He). Simple method: period = number of shells.

Explanation:
Ammonium ion (NH₄⁺) is formed when NH₃ donates its lone pair to H⁺, forming a coordinate (dative) bond. CH₄ and H₂O have ordinary covalent bonds; NaCl is ionic. In NH₄⁺, all four N–H bonds become equivalent.

Explanation:
Saponification is the hydrolysis of triglycerides (fats/oils) with NaOH or KOH to produce glycerol and the sodium or potassium salts of long-chain fatty acids, which are soaps. Esterification is the formation of esters from acid and alcohol. Emulsification is the dispersion of one liquid in another. Hydrogenation is addition of H₂. Hard soaps use NaOH, soft soaps use KOH. Soaps clean by micelle formation.