Ionization energy decreases down a group because: MCQ with Answer and Explanation

Explanation:
Sodium carbonate (soda ash) is dissolved in water and crystallized to obtain washing soda. Heating baking soda gives anhydrous sodium carbonate. Brine electrolysis gives NaOH, Cl₂, H₂. Solvay process makes Na₂CO₃.

Explanation:
Calcium (Ca, Z=20) has configuration 2,8,8,2. 4 shells → Period 4; 2 valence electrons → Group 2. Mg is Group 2, Period 3. Sr is Group 2, Period 5. Be is Group 2, Period 2.

Explanation:
Esterification is the chemical reaction where a carboxylic acid reacts with an alcohol in the presence of a strong acid catalyst (like conc. H₂SO₄) to produce an ester and water. Saponification is the reverse process, involving the alkaline hydrolysis of esters to form soap and glycerol.