Important Scientific (96) MCQs with Answers

Past Paper MCQ

What is the purpose of a Scotograph?

• A.To record brain activity
• B.To measure wind speed
• C.To detect earthquakes
• D.To aid the blind to write

Past Paper MCQ

What is the primary use of a chronometer?

• A.Measuring atmospheric pressure
• B.Measuring wind speed
• C.Measuring time
• D.Measuring electric current

A student consistently reports 0.2 ml less than the actual value. This is an example of?

• A.Random error
• B.Systematic error
• C.Gross error
• D.Instrumental limitation

A Dart gun is used _?

• A.For tranquillizing and trapping big animals
• B.For measuring wind speed
• C.For detecting earthquakes
• D.For measuring altitude

How does differential thermal analysis (DTA) differ from differential scanning calorimetry (DSC)?

• A.DTA measures changes in temperature while DSC measures changes in heat flow
• B.DTA measures changes in heat flow while DSC measures changes in temperature
• C.Both DTA and DSC measure changes in temperature only
• D.Both DTA and DSC measure changes in heat flow only

Which term is defined as the measure of an instrument by which it is error-free?

• A.Precision
• B.Resolution
• C.Sensitivity
• D.Accuracy

is a technique used to determine the concentration of colored compounds in solution.

• A.Chromatography
• B.Colorimetry
• C.Spectrophotometry
• D.Titration

What is the size of a porcelain filter?

• A.0.2 micrometre
• B.0.5 micrometre
• C.1.0 micrometre
• D.None of these

What type of sample cuvette should be used for measuring the absorbance of a molecule at 220 nm?

• A.Glass cuvette
• B.Polystyrene cuvette
• C.Plastic cuvette
• D.Quartz cuvette

What is the unit of Rf in chromatography?

• A.cm
• B.mm
• C.No unit
• D.m/s