Lanthanum (La) and Cerium (Ce) are both f-block elements, belonging to the lanthanide series.

The mass of an electron is significantly less than that of protons and neutrons.

The electron has the least mass compared to protons and neutrons.

Substituting (0, -4) into the equation gives 4(0) - 5(-4) + 20 = 0, which is true.

Condensation is the process where gas changes to liquid.

Free expansion is an irreversible process as it occurs without any external pressure acting on the gas.

An isochoric process is one that occurs at constant volume.

Angle is a pure number and has no dimensions, while force, energy, and pressure all have dimensions.

Velocity is a vector quantity as it has both magnitude and direction, while mass, temperature, and speed are scalar quantities.

The azimuthal quantum number (l) describes the shape of an orbital.

H2O → H2 + O2 involves the oxidation of water to hydrogen and oxygen, making it a redox reaction.

In the reaction Fe2O3 + 3CO → 2Fe + 3CO2, iron (Fe) is reduced as it gains electrons from carbon monoxide (CO).

0.1 M glucose is a non-electrolyte and does not dissociate, thus it has the highest freezing point compared to the ionic solutions.

Carbon (C) acts as a reducing agent as it donates electrons to reduce Fe2O3 to Fe.

Carbon (C) acts as a reducing agent as it donates electrons to reduce Fe2O3 to Fe.

Carboxylic acids are more acidic than alcohols due to the resonance stabilization of their conjugate base, making the statement 'They are less acidic than alcohols' incorrect.

Not all coordination compounds are colored; the color depends on the nature of the metal and the ligands involved. Some coordination compounds can be colorless.

Thermal conductivity is a measure of a material's ability to conduct heat; it varies with material type.

Adsorption isotherms illustrate how the amount of adsorbate on a solid surface varies with pressure at a constant temperature.

Adsorption is a surface phenomenon as it occurs at the interface between phases.

Coordination compounds can exhibit optical isomerism due to the arrangement of ligands around the central metal ion.

Galvanic cells convert chemical energy into electrical energy spontaneously.

A convex lens can form both real and virtual images depending on the position of the object relative to the focal point.

The law of conservation of energy states that energy cannot be created or destroyed, but it can be transformed from one form to another.

The nucleus of an atom contains protons and neutrons, which are collectively known as nucleons.

In an adiabatic process, there is no heat exchange with the surroundings, and the temperature of the system changes due to work done on or by the system.

In an isochoric process, the volume of the system remains constant.

The complex [Fe(CN)6]3- is a low-spin complex due to the strong field nature of CN- ligands, resulting in paired electrons.

Adsorption isotherms describe the relationship between the amount of adsorbate on the adsorbent and its pressure at a constant temperature, illustrating how adsorption varies with pressure.

Gravitational fields are always attractive, pulling masses towards each other.