The reaction 2H₂O → 2H₂ + O₂ is a: MCQ with Answer and Explanation

Explanation:
Down a group, number of shells increases, atomic radius increases, and inner electrons shield the outermost electron from the nucleus. The effective nuclear charge experienced by valence electron decreases, making it easier to remove. Thus ionization energy decreases. For example, IE of Cs

Explanation:
The zeolite (permutit) process is used to remove water hardness. Zeolite (hydrated sodium aluminum silicate) exchanges its Na⁺ ions for the Ca²⁺ and Mg²⁺ ions in hard water, thus softening it. It does not remove bacteria, dissolved gases, or suspended solids.

Explanation:
The Chlor-alkali process involves the electrolysis of aqueous NaCl (brine). It produces sodium hydroxide (NaOH) at the cathode, chlorine gas (Cl₂) at the anode, and hydrogen gas (H₂) at the cathode. The Solvay process produces sodium carbonate, not sodium hydroxide.