Important Scientific (96) MCQs with Answers

Past Paper MCQ

Radioactivity is measured by

• A.Hygrometer
• B.Barometer
• C.Calorimeter
• D.Geiger counter

Which one of the following pieces of information cannot be obtained from an infra-red spectrum?

• A.Functional groups present
• B.Identification of compound by fingerprint region
• C.Presence of hydrogen bonding
• D.The molecular mass

The comparative rates at which the solutes move in paper chromatography depends upon ?

• A.Density of the paper
• B.Molecular weight of the solute
• C.Boiling point of the solvent
• D.Rf values

Paper chromatography is a type of?

• A.Partition chromatography
• B.Adsorption chromatography
• C.Ion-exchange chromatography
• D.Gel filtration chromatography

A method which is used to separate coloured chemicals or substances, especially dyes is known as?

• A.Paper chromatography
• B.Distillation
• C.Filtration
• D.Crystallization

The substance used to determine the end point of titration is called _?

• A.Indicator
• B.Catalyst
• C.Electrolyte
• D.None of these

In voltammetry, the _ is fixed throughout analysis?

• A.Current
• B.Potential difference
• C.Resistance
• D.Conductance

The most common and simple technique of chromatography is _?

• A.Paper Chromatography
• B.Column Chromatography
• C.Gas Chromatography
• D.Thin Layer Chromatography

Proteins are detected by ?

• A.Biuret test
• B.Benedict's test
• C.Iodine test
• D.Fehling's test

What is the stationary phase in paper chromatography?

• A.Silica gel
• B.Alumina
• C.Paper (Cellulose)
• D.Water