Chemistry Faculty Interview Questions and Answers for Freshers

Molarity is the concentration of a solution in terms of moles of solute per liter of solution, while molality is the concentration of a solution in terms of moles of solute per kilogram of solvent.

• Molarity is an extensive property, while molality is an intensive property.

• Molarity changes with temperature and pressure, while molality remains constant.

• Molality is preferred in calculations involving colligative properties.

• Example: A solution containing 1 mole of solute in 1 lite...read more

Vapour pressure is the pressure exerted by a vapour in equilibrium with its liquid or solid form, while partial pressure is the pressure exerted by a single gas in a mixture.

• Vapour pressure is specific to a substance, while partial pressure is a property of a gas in a mixture.

• Vapour pressure is dependent on temperature, while partial pressure is dependent on the concentration of the gas in the mixture.

• In a mixture of gases, the total pressure is the sum of the partial pressur...read more

Entropy is the measure of disorder or randomness in a system, while enthalpy is the measure of heat energy in a system.

• Entropy is a state function, while enthalpy is a path function.

• Entropy increases with an increase in disorder, while enthalpy increases with an increase in heat energy.

• Entropy is represented by the symbol S, while enthalpy is represented by the symbol H.

• Entropy is measured in joules per kelvin (J/K), while enthalpy is measured in joules (J).

• An example of entr...read more

The Arrhenius equation describes the relationship between the rate constant of a chemical reaction and temperature.

• The equation is given as k = Ae^(-Ea/RT), where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature.

• The Arrhenius equation helps to explain the effect of temperature on reaction rates.

• Higher temperatures generally lead to higher reaction rates due to the exponential term in the equa...read more

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it.

• Buffer solutions are made up of a weak acid and its conjugate base or a weak base and its conjugate acid.

• They are used in various chemical and biological processes to maintain a stable pH.

• Examples of buffer solutions include acetic acid/sodium acetate buffer and phosphate buffer.

• Buffer capacity is the amount of acid or base that can be added to a buffer solution witho...read more