I Quiz - Research Methodology

Which among the following statements are not true?

• All electrical equipments in the lab must be grounded or earthed properly.

• Heat sources such as spirit lamp, Bunsen burners, heater can be placed near flammable substances.

• Use of chemical fume hood is an important safety measure to prevent hazardous

        chemicals.

• It is necessary to wear gloves in the lab.

What does a pH meter measure?

• Pressure             

• Power of salts

• Power of hydrogen ions

• Temperature

What is the pH range typically measured by a standard pH meter?

• 0 to 14

• -1 to 1

• 1 to 100

• 0 to 7

The pH of an acid is above 7 and a base is below 7.

• True

• False

What happens to the pH of a solution when the concentration of hydrogen ions increases?

• pH increases

• pH decreases 

• pH remains constant

• pH becomes neutral

In a colorimeter, what is the purpose of a filter?

• To block specific wavelengths 

• To calibrate the instrument

• To amplify the signal

• To measure temperature

Which type of cuvette is commonly used in UV-Visible spectrophotometry?

• Plastic cuvette

• Glass cuvette

• Metal cuvette

• Quartz cuvette

What is the primary function of a flame photometer?

• Measure light intensity 

• Measure temperature

• Measure the concentration of metal ions in a sample

• Measure pH level

What does FTIR stand for?

• Frequency Transmission Infrared

• Fourier Transform Infrared

• Fast Time Infrared 

• Focused Transmittance Infrared

In phase-contrast microscopy, what does the term "phase" refer to?

• Color of the specimen

• Density variations in the specimen

• The stage of the cell cycle

• The refractive index of the specimen