10+ Chemistry Faculty Interview Questions and Answers

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

Packing efficiency is the ratio of the volume occupied by particles to the total volume of the container. Limiting reagent is the reactant that gets consumed first and limits the amount of product formed. Aspirin can be prepared from phenol by acetylation using acetic anhydride and a catalyst.

• Packing efficiency is important in determining the density of a material.

• Limiting reagent can be identified by calculating the amount of product that can be formed from each reactant.

• Asp...read more

Teaching strategy should be tailored to the individual needs of the student, whether they are a slow runner or quick grasper.

• For slow runners, it is important to break down concepts into smaller, more manageable pieces and provide additional support and resources.

• For quick graspers, it is important to challenge them with more advanced material and encourage independent learning.

• Differentiated instruction can be used to meet the needs of both types of learners.

• Examples: provid...read more

The structure of an element in period 14 depends on its atomic number and electron configuration.

• Elements in period 14 can have various structures depending on their atomic number.

• The structure can be determined by the electron configuration of the element.

• For example, if element X has an atomic number of 57, its structure would be [Xe] 4f^14 5d^1 6s^2.

EDTA is used in titration to chelate metal ions and prevent interference from other metal ions.

• EDTA forms stable complexes with metal ions, making it easier to determine the concentration of the metal ion being titrated.

• EDTA can be used to titrate a variety of metal ions, including calcium, magnesium, and zinc.

• EDTA is often used in complexometric titrations, where the goal is to determine the concentration of a metal ion in a sample.

• EDTA can also be used to remove metal ions ...read more

The byproduct of reacting iodine with alcohol is iodoalkane.

• When iodine reacts with alcohol, it replaces the hydrogen atom in the alcohol molecule.

• The resulting compound is called iodoalkane or alkyl iodide.

• The reaction is an example of a substitution reaction.

• For example, when iodine reacts with ethanol, the byproduct is ethyl iodide.

Aluminium reacts with the acidic content of mango pickle, leading to the formation of harmful compounds.

• Aluminium reacts with the acidic content of mango pickle

• This reaction can lead to the formation of harmful compounds

• These compounds can contaminate the pickle and make it unsafe for consumption

Sandmeyer's reaction is a chemical reaction used to convert an aryl diazonium salt to a halide, hydroxide, or cyano compound.

• Involves the replacement of the diazonium group (-N2+) with a halogen, hydroxyl, or cyano group.

• The reaction is carried out in the presence of a copper(I) salt and an acid.

• The reaction can be used to synthesize a variety of compounds such as chlorobenzene, bromobenzene, iodobenzene, phenol, and benzonitrile.

• The reaction mechanism involves the formation ...read more

Group 17 elements are also known as halogens.

• Group 17 elements are highly reactive nonmetals.

• They have 7 valence electrons and tend to gain 1 electron to achieve a stable octet.

• Halogens include fluorine, chlorine, bromine, iodine, and astatine.

• They are found in various compounds and play important roles in chemistry and biology.

A demo about acid bases and salts

• Demonstrate the reaction between an acid and a base to form a salt

• Use indicators to show the change in pH during the reaction

• Explain the concept of neutralization and the formation of water as a byproduct

• Discuss the properties of acids, bases, and salts

• Show examples of common acids, bases, and salts

Salt is a compound formed by the reaction of an acid with a base. It consists of positive and negative ions and is commonly used for seasoning and preserving food.

• Salt is composed of positive ions (cations) and negative ions (anions)

• Common examples of salt include sodium chloride (table salt), potassium chloride, and calcium chloride

• Salt is formed through the reaction of an acid with a base, resulting in the neutralization of the acid and base

• Salt is widely used for seasoning...read more