Unit 2: Experimental Techniques in Chemistry

31. The process of separating a solid from a liquid using a filter paper is called:

a) Distillation
b) Centrifugation
c) Filtration
d) Evaporation
Answer: c) Filtration

32. The device used to provide a controlled flame for heating is called a:

a) Hot plate
b) Bunsen burner
c) Water bath
d) Electric furnace
Answer: b) Bunsen burner

33. Which technique is used to separate a mixture of gases?

a) Distillation
b) Chromatography
c) Filtration
d) Centrifugation
Answer: b) Chromatography

34. In titration, the solution whose concentration is known is called the:

a) Titrant
b) Analyte
c) Solvent
d) Indicator
Answer: a) Titrant

35. The device used to measure the pH of a solution is called a:

a) Spectrophotometer
b) pH meter
c) Refractometer
d) Centrifuge
Answer: b) pH meter

36. The use of a thermometer in an experiment is primarily to:

a) Measure the mass of a substance
b) Measure the volume of a liquid
c) Monitor the temperature of a reaction
d) Measure the pressure of a gas
Answer: c) Monitor the temperature of a reaction

37. A solution used in titrations to indicate the end point is called:

a) Solvent
b) Reagent
c) Indicator
d) Titrant
Answer: c) Indicator

38. The process of separating components of a mixture based on their different rates of movement through a medium is known as:

a) Centrifugation
b) Chromatography
c) Filtration
d) Distillation
Answer: b) Chromatography

39. Which of the following techniques is best suited for separating a mixture of liquids with different boiling points?

a) Filtration
b) Centrifugation
c) Distillation
d) Chromatography
Answer: c) Distillation

40. The process of separating a solid from a liquid by passing the mixture through a porous medium is called:

a) Evaporation
b) Filtration
c) Distillation
d) Crystallization
Answer: b) Filtration