Analytical Instrumentation Mock Test 4

10%

Question 1 of 10

1. In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?

When all the components have very different thermal conductivities

When all but one component have same thermal conductivities

When all components have very different thermal conductivities except two of them which are the same

When all the components have same thermal conductivities

Question 1 of 10

Question 2 of 10

2. When would the recorder indicate a zero base line in analyzers based on gas density?

When the detector on the reference side is cooler than that on the sample side

When the detector on the sample side is cooler than that on the reference side

When both the detectors are equally cooled

When flow is unbalanced

Question 2 of 10

Question 3 of 10

3. Which of the following cannot be used as secondary reference electrode?

Calomel electrode

Mercury-mercury sulphate electrode

Silver-silver chloride electrode

Glass electrode

Question 3 of 10

Question 4 of 10

4. West-Gaeke colorimetric method is used to analyse oxides of nitrogen.

True

False

Question 4 of 10

Question 5 of 10

5. Which of the following is not the disadvantage of glass electrodes?

Materials suspended on glass should be wiped out neatly to obtain proper results

The electrode must be washed thoroughly with distilled water to obtain proper results

Poor readings are obtained in buffered or unbuffered solutions

It is affected by oxidation reduction potentials in the solution

Question 5 of 10

Question 6 of 10

6. Which of the following bridges are used in thermal conductivity analyzers?

Anderson’s bridge

Schering’s bridge

Wheatstone bridge

Kelvin’s bridge

Question 6 of 10

Question 7 of 10

7. In flame ionization detectors, which of the following is the range adequate for atmospheric sampling?

0-2 ppm

0-20 ppm

0-1 ppm

0-100 ppm

Question 7 of 10

Question 8 of 10

8. The voltage required for striking the discharge in the presence of nitrogen is 1500V.

False

True

Question 8 of 10

Question 9 of 10

9. Which of the following is the wavelength at which CO laser operates?

6.179 µm

5.307 µm

4.952 µm

1.005 µm

Question 9 of 10

Question 10 of 10

10. Pure water is known to be which of the following?

Weak electrolyte

Not an electrolyte

Neither weak nor strong

Strong electrolyte

Question 10 of 10