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Laboratory Techniques and Principles Quiz

#1

Which laboratory technique is commonly used to separate components of a mixture based on their solubility?

Chromatography
Explanation

Separation based on solubility

#2

What is the purpose of a fume hood in a laboratory?

To prevent exposure to hazardous fumes
Explanation

Safety from fumes

#3

What is the purpose of a magnetic stirrer in a laboratory?

To mix solutions using a magnetic field
Explanation

Solution mixing with magnetic field

#4

What is the purpose of a Bunsen burner in a laboratory?

To heat substances with a consistent flame
Explanation

Consistent heating

#5

What is the purpose of a burette in a laboratory?

To measure volume of liquids with high precision
Explanation

Precise liquid volume measurement

#6

What is the purpose of a centrifuge in a laboratory?

To separate components of a mixture based on density
Explanation

Mixture separation by density

#7

Which laboratory technique is used to separate and purify compounds based on their boiling points?

Distillation
Explanation

Compound separation by boiling points

#8

Which laboratory instrument is commonly used to measure the volume of a liquid?

Pipette
Explanation

Volume measurement

#9

What is the purpose of a desiccator in a laboratory?

To dry substances by removing moisture
Explanation

Moisture removal

#10

Which laboratory technique is used to separate proteins based on their size and charge?

Gel electrophoresis
Explanation

Protein separation by size and charge

#11

Which laboratory apparatus is used to measure the melting point of a substance?

Melting point apparatus
Explanation

Melting point measurement

#12

Which laboratory technique is used to determine the concentration of a solution?

Titration
Explanation

Solution concentration determination

#13

Which laboratory technique is used to separate DNA fragments based on their size?

Gel electrophoresis
Explanation

DNA fragment separation by size

#14

What is the purpose of a desiccant in a laboratory desiccator?

To absorb moisture
Explanation

Moisture absorption

#15

Which laboratory technique is used to identify the components of a compound based on their mass-to-charge ratio?

Mass spectrometry
Explanation

Identification by mass-to-charge ratio

#16

Which laboratory technique is used to determine the structure of molecules by analyzing their interaction with polarized light?

Polarimetry
Explanation

Molecular structure determination using polarized light

#17

Which laboratory technique is used to determine the molecular structure of a compound by analyzing its nuclear spins?

Nuclear magnetic resonance (NMR)
Explanation

Molecular structure determination by nuclear spins analysis

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