TB_ Quality Laboratory Equipment/Apparatus/Glasswares

Question 1

Which is not a volumetric glassware?
a. beaker
b. burette
c. pippette
d. volumetric flask

Answer 1

a. beaker

Question 2

Ambient laboratory conditions are not the same to standard conditions, therefore the volumes
dispensed in volumetric glassware are often not the same as the manufacturer’s specifications, but
within some acceptable limits determined by the manufacturer. This slight variation in volume
will cause a _________ error that are based on volume-volume or mass-volume concentrations.
a. random
b. systematic
c. gross
d. all of the above

Answer 2

b. systematic

Question 3

Glass cuvettes are typically for use in the wavelength range of visible light, whereas fused quartz
tends to be used for ____________ applications.
a. microwave
b. IR
c. uv/visible
d. none of the above

Answer 3

c. uv/visible

Question 4

In this column type, the retention is governed by the interaction of the polar parts of the stationary
phase and solute.
a. reverse phase
b. ion exchange
c. column guard
d. normal phase

Answer 4

d. normal phase

Question 5

A stable light source in AAS analysis, which is necessary to emit the sharp characteristic spectrum
of the element to be determined
a. Tungsten lamp
b. hollow cathode lamp
c. deuterium lamp
d. Nerst blower

Answer 5

b. hollow cathode lamp

Question 6

The HPLC column type in which molecules are separated according to size.
a. Ion exchange
b. size exclusion
c. normal phase
d. reverse phase

Answer 6

b. size exclusion

Question 7

Non Polar Reverse phase and C8 (octyl bonded silica) are commonly used for hydrophobic
Analytes in solid phase extraction. An example is
a. C18 (octadecyl bonded silica)
b. Resins
c. Florisil
d. alumina

Answer 7

a. C18 (octadecyl bonded silica)

Question 8

Filters that can be heated and used in gravimetric analysis.
a. ordinary filter paper
b. GFF
c. Sintered glass fibers
d. none of the above

Answer 8

b. GFF

Question 9

Objects cannot be weighed when hot or warm. But if you were to take a sample out and wait for
it to cool it would pick up moisture like that so put it in ________.
a. an oven
b. a dessicator
c. at room temperature
d. fumehood

Answer 9

b. a dessicator

Question 10

Weighing to constant weight means a weighing difference of ±0.1mg using a calibrated
analytical balance.
a. ±1.0 mg
b. ±0.01g
c. ±0.01mg
d. ±0.1mg

Answer 10

d. ±0.1mg

Question 11

The following are common desiccants except for _______
a. Calcium Sulfate
b. Ammonium Acetate
c. Calcium Chloride
d. Magnesium Oxide

Answer 11

b. Ammonium Acetate

Question 12

During ignition for ashing, muffle furnaces that go up to 1100oC are used primarily for this and
________ is needed to contain the sample.
a. porcelain crucible
b. evaporating dish
c. beaker
d. all of the above

Answer 12

a. porcelain crucible

Question 13

In making standard solutions, ______ are used for measuring liquid with high accuracy.
a. beakers
b. volumetric flasks
c. Erlenmeyer flasks
d. Nesslers Tubes

Answer 13

b. volumetric flasks

Question 14

. Used for distillation or heating of liquids, allows uniform heating.
a. round bottom flask
b. Erlenmeyer flask
c. test tube
d. Florence flask

Answer 14

a. round bottom flask

Question 15

Most popular burettes are 10 mL, 25 mL and 50 mL types. Which has the highest resolution?
a. 25 mL
b. 10 mL
c. 50 mL
d. All of the above

Answer 15

c. 50 mL

Question 16

Used for vacuum filtration using filter paper.
a. gooch crucible
b. Buchner funnel
c. rotary evaporator
d. rubber aspirator

Answer 16

b. Buchner funnel

Question 17

In chromatography, ________ is carried out on glass plates or strips of plastic or metal coated
on one side with a thin layer of adsorbent.
a. HPLC
b. GC
c. Paper Chromatography
d. Thin Layer Chromatography

Answer 17

d. Thin Layer Chromatography

Question 18

The nominal volume of water (or mercury) contained, or delivered by an article of volumetric glassware,
at its reference temperature.
a. capacity
b. liter
c. mL
d. uL

Answer 18

a. capacity

Question 19

In verification of laboratory glassware, ________ is usually measured in terms of the tolerance,
which is the uncertainty in a measurement made with the glassware. Class A volumetric
glassware has a lower tolerance than Class B.
a. mean
b. accuracy
c. difference
d. precision

Answer 19

b. accuracy

Question 20

Glass apparatus that are generally received with calibration certificates from suppliers.
a. Class B
b. Class A
c. Erlenmeyer flasks
d. Beakers

Answer 20

b. Class A