Explanation

When sodium benzoate is heated with soda lime (NaOH + CaO), it undergoes decarboxylation.

The –COONa group is replaced by –H, producing benzene.

Reaction:

C₆H₅COONa + NaOH → C₆H₆ + Na₂CO₃

Explanation

Ninhydrin reacts with free amino acids to produce a bluish violet (Ruhemann’s purple) compound.

This reaction is commonly used to detect amino acids and proteins in chromatographic analysis.

Explanation

In triphenylmethane, the three benzene rings are isolated — they are not fused but attached through a central carbon atom.

In compounds like naphthalene, anthracene, and phenanthrene, the benzene rings are fused, not isolated.

Explanation

In a beta elimination (E1 or E2) reaction, the base (nucleophile) removes a beta-hydrogen atom.

This leads to the formation of a double bond between the alpha and beta carbons.

Explanation

For an ideal gas, the compressibility factor Z = PV/nRT = 1.

Hence, it remains the same (1) under all conditions of pressure and temperature.

Explanation

Explanation

For a first-order reaction, half-life (t₁/₂ = 0.693/k) is independent of initial concentration.

It only changes with temperature, as temperature affects the rate constant (k).

Explanation

In NaOH, the bond between Na⁺ and OH⁻ is ionic, while the bond between O and H in the hydroxyl group is covalent.

Hence, it contains both types of bonds.

Explanation

At 22% concentration, HCl and water form a constant boiling mixture (azeotrope).

This prevents further increase in concentration by simple boiling.

Explanation

H₃PO₄ has three ionizable hydrogen atoms.

Hence, its basicity is 3, meaning it can donate three protons (H⁺).