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.

Adsorption is generally an exothermic process, as it releases energy.

Aldehydes are generally more reactive than ketones due to the presence of the hydrogen atom attached to the carbonyl carbon.

Ampere's Law is primarily applicable to static currents and requires modifications for time-varying fields.

In an arithmetic progression, the difference between consecutive terms is constant, which is the defining property of an AP.

In an endothermic reaction, heat is absorbed from the surroundings.

In an equilateral triangle, all sides are equal and all angles are equal, each measuring 60 degrees.

An ideal gas is considered to have no volume and no intermolecular forces, making option D correct.

For capacitors in parallel, the total capacitance is the sum of the individual capacitances: C_total = C₁ + C₂ + ...

Catalysts provide an alternative pathway with a lower activation energy, thus increasing the reaction rate without being consumed.

Chemisorption involves the formation of a chemical bond and is generally an irreversible process.

Colligative properties depend on the number of solute particles, not their identity.

Coordination compounds can exhibit different colors due to the presence of different ligands and their ability to split d-orbitals.

A number is divisible by 5 if it ends in either 0 or 5.

A number is divisible by 9 if the sum of its digits is divisible by 9.

Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction, not necessarily when concentrations are equal.

Electric current flows from positive to negative in a circuit.

Electric field lines point from positive to negative charges and never cross each other.

Enthalpy is a state function, meaning it depends only on the initial and final states, not the path taken.

Entropy is a state function, meaning it depends only on the state of the system and not on how it reached that state.

Exothermic reactions release heat, resulting in a negative enthalpy change.

Factors of a number are the integers that can divide that number without leaving a remainder, while multiples are the result of multiplying that number by an integer. Hence, factors are always less than or equal to multiples.

The correct equation for Gibbs Free Energy is ΔG = ΔH - TΔS, which relates enthalpy, entropy, and temperature.

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

Gravitational force is always attractive, acting between any two masses.

Gravitational potential energy can be negative when an object is below a reference point, such as the Earth's surface.

In a harmonic progression, the terms can indeed be negative, as the definition does not restrict the terms to positive values.

In a harmonic progression, the reciprocals of the terms indeed form an arithmetic progression.

HCF and LCM can be equal when both numbers are the same.

Ideal gases are considered to have no volume and no intermolecular forces.