R4RIN – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 8

In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?

1. Ferrocene derivatives
2. Urease
3. Polyacrylamide
4. Biochips

✅ Correct Answer: 1

Biosensors measure glucose concentrations between which of the following ranges?

1. 10-1 to 10-2 M
2. 10-2 to 10-4 M
3. 10-1 to 10-4 M
4. 10-1 to 10-7 M

✅ Correct Answer: 4

Transducers employed in the bulk of enzyme electrodes use which of the following principles?

1. Amperometric
2. Optical
3. Magnetic
4. Colorimetric

✅ Correct Answer: 1

Which of these biosensors use the principle of heat released or absorbed by a reaction?

1. Potentiometric biosensor
2. Optical biosensors
3. Piezo-electric biosensors
4. Calorimetric biosensors

✅ Correct Answer: 4

Which of the following biosensors use the movement of electrons produced during redox reactions?

1. Amperometric biosensor
2. Potentiometric biosensors
3. Piezo-electric biosensors
4. Optical biosensors

✅ Correct Answer: 1

Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

For constructing the glucose sensor, which of the following is used as a gel?

1. Urea
2. Urease
3. Acrylamide
4. Polyacrylamide

✅ Correct Answer: 4

Which of the following transducers must be used for dissolved oxygen analyser?

1. Potentiometric
2. Polarographic
3. Ion-selective electrode
4. Optical transducer

✅ Correct Answer: 2

How does solubility of oxygen in water change with respect to temperature?

1. It decreases with increase in temperature
2. It increases with increase in temperature
3. It decreases with decrease in temperature
4. It does not depend on temperature

✅ Correct Answer: 1

The water to be analysed flows into the condenser through which of the following components?

1. Filter
2. Semi-permeable membrane
3. Throttling device
4. Platinum filament

✅ Correct Answer: 3

Which of the following is the function of the throttling device?

1. Filtering
2. Maintains pH of a water
3. Purifies water
4. Maintains constant flow rate

✅ Correct Answer: 4

Which of the following section plays a major role in maintaining the accuracy of the dissolved oxygen analyser?

1. Analysing section
2. Inlet section
3. Transmitting section
4. Condensing section

✅ Correct Answer: 3

Which of the following bridges are used in dissolved oxygen analyser?

1. Kelvin’s bridge
2. Wheatstone bridge
3. Schering’s bridge
4. Anderson’s bridge

✅ Correct Answer: 2

In dissolved oxygen analyser, the electrometer consists of which of the following solutions?

1. Calcium hydroxide solution
2. Magnesium hydroxide solution
3. Potassium hydroxide solution
4. Calcium oxide solution

✅ Correct Answer: 3

The dissolved oxygen analyser is based on which of the following meters?

1. Amperometer
2. Katharometer
3. pH meter
4. Voltmeter

✅ Correct Answer: 2

Oxygen content can be controlled by adding which of the following materials with water?

1. Acidic solution
2. Basic solution
3. Iodine
4. Hydrazine

✅ Correct Answer: 4

In dissolved oxygen analyser, normally more than one condenser is used.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Normally, electrodes measure which of the following parameters?

1. Activity
2. Activity co-efficient
3. Blank constant
4. Ionic co-efficient

✅ Correct Answer: 1

Which of the following represent the concentration of a solution?

1. Only free ions
2. Only bound ions
3. Free ions and bound ions
4. Either free ions or bound ions

✅ Correct Answer: 3

Sodium selective electrode provides a good response in measurement when the pH is above which of the following values?

1. 2
2. 3
3. 5
4. 10

✅ Correct Answer: 4

Which of the following are used to free bound ions or liberate bound ions?

1. Colouring agents
2. Ammonia Buffer
3. Reagents
4. Iodine solution

✅ Correct Answer: 3

In which part of the apparatus is the reference and ion selective electrodes placed?

1. Head tank
2. Flow cell
3. Reservoir
4. Solenoid valve

✅ Correct Answer: 2

The output of the electrode in sodium analyser is proportional to which of the following parameters?

1. Activity
2. Concentration
3. Negative logarithm of sodium ion concentration
4. Logarithm of sodium ion concentration

✅ Correct Answer: 4

Cleaning process gives accuracy and long life.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Presence of sodium sulphate in water causes corrosion in boilers.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following principles are used in silica analyser?

1. Amperometric principle
2. Colorimetric principle
3. Coulometric principle
4. Magnetic principle

✅ Correct Answer: 2

Which of the following is not added to the sample during analysis during silica analysis?

1. Ammonium Molybdate
2. Sulphuric acid
3. Reducing solution
4. Iodine solution

✅ Correct Answer: 4

Which of the following detectors are used in silica analyser?

1. Photovoltaic cell
2. Photo multiplier
3. Photo emissive tubes
4. Flame emission detector

✅ Correct Answer: 1

The output from both the detectors is given to which of the following devices?

1. Filters
2. Microprocessor
3. Recorder
4. Differential Amplifier

✅ Correct Answer: 4

If the differential amplifier gives zero as output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?

1. The concentration of silica in sample and reference solution is equal
2. The concentration of silica in a reference solution is more than that in the sample solution
3. The concentration of silica in sample solution is more than that in the reference solution
4. Further processing is required to come to any conclusion

✅ Correct Answer: 1

If the differential amplifier gives a positive output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?

1. The concentration of silica in sample and reference solution is equal
2. The concentration of silica in sample and reference solution is equal
3. The concentration of silica in sample solution is more than that in the reference solution
4. Further processing is required to come to any conclusion

✅ Correct Answer: 3

If the differential amplifier gives a negative output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?

1. The concentration of silica in sample and reference solution is equal
2. The concentration of silica in a reference solution is more than that in the sample solution
3. The concentration of silica in sample solution is more than that in the reference solution
4. Further processing is required to come to any conclusion

✅ Correct Answer: 2

Which of the following statements are true?

1. More light is absorbed if the silica content is high in a solution
2. More light is transmitted if the silica content is high in a solution
3. Less light is absorbed if the silica content is high in a solution
4. More light is absorbed if the silica content is low in a solution

✅ Correct Answer: 1

How will the photodetector output be if silica content is high in a solution?

1. The output will be high
2. The output will be low
3. The output will be zero
4. Output cannot be determined

✅ Correct Answer: 2

What will be the final colour of the solution obtained during silica analysis?

1. Pink
2. Red
3. Blue
4. Yellow

✅ Correct Answer: 3

During the first sequence of the process, sample is added at the last.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Blank use compensates for the effect of temperature variation.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following are highly effective in producing ion pairs when they pass through the matter?

1. Alpha particles
2. Beta particles
3. Gamma particles
4. X-ray particles

✅ Correct Answer: 1

Which of the following can liberate photo electrons when they fall on certain metals?

1. Alpha particles
2. Beta particles
3. Gamma particles
4. X-ray particles

✅ Correct Answer: 4

Which of these particles are highly penetrating?

1. Alpha particles
2. Beta particles
3. Gamma particles
4. X-ray particles

✅ Correct Answer: 3

Alpha emission is characteristic of heavier radioactive elements such as thorium, uranium, etc.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following is not a mode by which beta particles lose energy on interaction with matter?

1. Photoelectric effect
2. Compton effect
3. Pair production
4. Collision effect

✅ Correct Answer: 4

The stability of the nucleus can be predicted by which of the following?

1. Electron to neutron ratio
2. Neutron to proton ratio
3. Proton to electron ratio
4. Neutron to electron ratio

✅ Correct Answer: 2

Which of the following is true about radiochemical methods?

1. Electron to neutron ratio
2. Neutron to proton ratio
3. Proton to electron ratio
4. Neutron to electron ratio

✅ Correct Answer: 2

Which of the following formulae gives the expression for half-life of a radioactive isotope when ‘λ’ is the decay constant?

1. 0.762/λ
2. 0.693/λ
3. 0.937/λ
4. 0.258/λ

✅ Correct Answer: 2

Which of the following emissions have low ionizing power?

1. Alpha particles
2. Beta particles
3. Gamma particles
4. X-ray particles

✅ Correct Answer: 3

Which of the following effect occurs when a gamma ray and an electron make an elastic collision?

1. Photoelectric effect
2. Compton effect
3. Pair production
4. Collision effect

✅ Correct Answer: 4

Which of the following effects transfers all the energy of the gamma ray to an electron in the inner orbit of the atom of the absorber?

1. Photoelectric effect
2. Compton effect
3. Pair production
4. Collision effect

✅ Correct Answer: 2

The basic unit used to describe the energy of a radiation particle is curie.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2