#1
What is the primary purpose of a Bunsen burner in the laboratory?
To heat substances
ExplanationProvides a flame for heating various substances.
#2
Which laboratory equipment is used to measure precise volumes of liquids?
Graduated cylinder
ExplanationAccurately measures liquid volumes.
#3
Which piece of equipment is used to measure the pH of a solution?
pH meter
ExplanationMeasures the acidity or alkalinity of a solution.
#4
What is the function of a centrifuge in a laboratory?
To separate components of a mixture based on density
ExplanationSpins samples to separate components by density.
#5
Which piece of equipment is used to accurately transfer small volumes of liquid?
Pipette
ExplanationDispenses small volumes of liquid accurately.
#6
Which laboratory equipment is used to measure the volume of a gas?
Gas syringe
ExplanationMeasures the volume of gases.
#7
What is the function of a magnetic stirrer in a laboratory?
To stir solutions
ExplanationAgitates solutions using a magnetic field.
#8
Which laboratory equipment is used to measure the mass of a liquid?
Analytical balance
ExplanationAccurately measures the mass of liquids.
#9
What is the function of a separatory funnel in a laboratory?
To separate immiscible liquids
ExplanationSeparates liquids based on density.
#10
What is the function of a burette in titration experiments?
To deliver precise volumes of solution
ExplanationDispenses solutions in controlled volumes.
#11
Which instrument is commonly used to measure the mass of substances?
Analytical balance
ExplanationMeasures mass with high precision.
#12
What is the function of a condenser in a laboratory setup?
To cool and condense vapors
ExplanationCondenses vapors into liquid form.
#13
Which of the following is NOT a type of flask commonly used in chemistry laboratories?
Beaker flask
ExplanationBeaker flasks are not commonly used.
#14
What is the purpose of a hot plate in a laboratory?
To heat substances
ExplanationProvides a flat surface for heating substances.
#15
Which instrument is used to measure the absorbance of light by a sample?
Spectrophotometer
ExplanationMeasures how much light a sample absorbs.
#16
Which instrument is used to measure the pressure of a gas?
Manometer
ExplanationMeasures gas pressure in a closed system.
#17
What is the purpose of a Soxhlet extractor in a laboratory?
To extract and purify compounds
ExplanationExtracts compounds from solid samples.
#18
Which instrument is used to measure the refractive index of a substance?
Refractometer
ExplanationMeasures how light bends through a substance.
#19
What is the purpose of a rotary evaporator in a laboratory?
To evaporate solvents
ExplanationConcentrates or removes solvents from solutions.
#20
What is the purpose of a fume hood in a laboratory setting?
To protect against chemical exposure
ExplanationProvides ventilation to remove hazardous fumes.
#21
What is the purpose of a desiccator in a laboratory?
To dry substances
ExplanationMaintains a low-humidity environment to dry substances.
#22
Which instrument is used to determine the melting point of a solid?
Melting point apparatus
ExplanationDetermines the temperature at which a solid melts.
#23
What is the purpose of a vacuum pump in a laboratory?
To remove air from a closed system
ExplanationCreates a vacuum by removing air from a sealed space.
#24
Which equipment is used to create a vacuum in a laboratory?
Vacuum oven
ExplanationCreates a vacuum for various laboratory processes.
#25
Which equipment is used to measure the surface tension of a liquid?
Surface tensiometer
ExplanationMeasures the force required to break the surface of a liquid.