Which of the following is a homogeneous mixture? MCQ with Answer and Explanation

Explanation:
Atomic radius increases down a group due to addition of new shells. Ionization energy, electronegativity, and electron affinity (generally) decrease down a group.

Explanation:
Bleaching powder is calcium oxychloride, CaOCl₂, made by passing chlorine gas over dry slaked lime (Ca(OH)₂): Ca(OH)₂ + Cl₂ → CaOCl₂ + H₂O. Quicklime is CaO, limestone is CaCO₃, gypsum is CaSO₄·2H₂O. Bleaching powder is used for bleaching cotton and paper, disinfecting water, and as an oxidizing agent. It releases chlorine on exposure to air or acids.

Explanation:
PV = constant at constant T and n. This is Boyle's law. If either P or V changes, the other changes inversely.