Junior Chemist Interview Questions and Answers for Freshers

Chemical isolation from natural products involves extraction, purification, and characterization techniques.

• Extraction: Use solvents to separate the desired chemical from the natural product.

• Purification: Employ techniques like chromatography or distillation to remove impurities.

• Characterization: Analyze the isolated chemical using spectroscopy or other methods to determine its structure and properties.

Concrete mix design is the process of determining the proportions of cement, water, aggregates, and admixtures to produce concrete with desired properties.

• Concrete mix design involves selecting the appropriate ingredients and their proportions to achieve the desired strength, workability, and durability of concrete.

• The mix design is typically based on the specific requirements of the project, such as strength grade, exposure conditions, and construction methods.

• Codes of mix d...read more

A tablet is a solid dosage form that contains medicinal substances or other substances intended for oral administration.

• Tablets are a common form of medication that are taken orally.

• They are made by compressing powdered ingredients into a solid form.

• Tablets can contain active pharmaceutical ingredients, excipients, binders, and fillers.

• They come in various shapes, sizes, and colors depending on the medication.

• Examples of tablets include aspirin, paracetamol, and birth control...read more

Coupling constant is a measure of the interaction between two or more atoms in a molecule.

• It is the distance between the peaks in a nuclear magnetic resonance (NMR) spectrum.

• It provides information about the chemical environment of the atoms in a molecule.

• It is used to determine the connectivity and structure of a molecule.

• Coupling constants can be scalar or dipolar.

• Examples include J-coupling and H-H coupling.

Benzene is a cyclic hydrocarbon with a hexagonal ring structure and alternating double bonds.

• Benzene has a molecular formula of C6H6.

• It consists of six carbon atoms arranged in a hexagonal ring.

• Each carbon atom is bonded to one hydrogen atom.

• The carbon-carbon bonds in benzene alternate between single and double bonds.

• The alternating double bonds create a resonance structure, resulting in a stable and planar molecule.

• Benzene is a highly aromatic compound and is commonly used a...read more