Bharat Biotech International Executive Quality Control Interview Questions and Answers

Chemistry is the study of matter, its properties, composition, and interactions.

• Chemistry involves understanding the structure and behavior of atoms and molecules.

• It explores how substances react with each other and transform into new substances.

• Chemistry is essential in fields like pharmaceuticals, food science, and environmental science.

• Examples include studying the properties of elements on the periodic table and an

The pH formula is used to calculate the acidity or alkalinity of a solution.

• pH = -log[H+]

• pH = -log[H3O+]

• pH = log(1/[H+])

• pH = log(1/[H3O+])

There are 118 elements in the periodic table.

• There are 118 known elements in the periodic table.

• Elements are organized by atomic number, electron configuration, and recurring chemical properties.

• Examples of elements include hydrogen, oxygen, gold, and uranium.

Noble gases are a group of chemical elements with very low reactivity and full outer electron shells.

• Noble gases are located in Group 18 of the periodic table.

• They are also known as inert gases because they rarely react with other elements.

• Examples of noble gases include helium, neon, argon, krypton, xenon, and radon.

Avogadro's number is a constant representing the number of constituent particles (usually atoms or molecules) in one mole of a substance.

• Avogadro's number is approximately 6.022 x 10^23.

• It is named after Italian scientist Amedeo Avogadro.

• It is used in chemistry to relate the mass of a substance to the number of atoms or molecules it contains.