50 Asked Interview Questions and Answers (2024)

An atom is the basic unit of an element, while a molecule is a group of atoms bonded together.

Example:

Oxygen (O2) is a molecule composed of two oxygen atoms.

Electronegativity is a measure of an atom's ability to attract and hold electrons in a chemical bond.

Example:

Fluorine has a high electronegativity, leading it to attract electrons strongly in a bond.

pH is a measure of the acidity or basicity of a solution. It is crucial for understanding chemical reactions and biological processes.

Example:

A solution with a pH of 7 is neutral, like pure water.

Stoichiometry is the calculation of reactants and products in chemical reactions based on balanced equations.

Example:

In the reaction 2H2 + O2 → 2H2O, stoichiometry helps determine the amount of oxygen needed to produce a given amount of water.

Exothermic reactions release energy, while endothermic reactions absorb energy from the surroundings.

Example:

Combustion is often an exothermic reaction, while photosynthesis is an endothermic process.

Chemistry Interview Questions and Answers