Analytical Instrumentation Mock Test 4

10%

Question 1 of 10

1. The zero of the scale is calibrated using which of the following as the sample?

Air

Pure nitrogen

Water

Inert gas

Question 1 of 10

Question 2 of 10

2. Which of the following is the relation between the concentration of hydrogen and hydroxyl ions in an acidic solution?

They are both always the same

The concentrations keep changing

Value of hydrogen ion concentration is greater

Value of hydroxyl ion concentration is greater

Question 2 of 10

Question 3 of 10

3. In Jacob-Hochheiser method, NO2 is passed through a dilute solution of sodium hydroxide forming the nitrite ion. The nitrite ion is reacted with sulphanilamide and ethylene diamine in which of the following to form the highly coloured azo dye?

Sulphuric acid

Phosphoric acid

Nitric acid

Hydrochloric acid

Question 3 of 10

Question 4 of 10

4. A stripper column used in gas chromatography, can be used to retain which of the following when an air sample is passed through it?

Light hydrocarbons

Methane

Heavy hydrocarbons

Question 4 of 10

Question 5 of 10

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

When all but one component have same thermal conductivities

When all the components 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 very different thermal conductivities

Question 5 of 10

Question 6 of 10

6. Which of the following are not the characteristics of Non-dispersive infrared analyzer method?

Easy to maintain

High sensitivity

High response speed

Effect of interfering components is high

Question 6 of 10

Question 7 of 10

7. Given below, is the diagram of Ultraviolet Fluorescence method. Identify the unmarked component.

Supply

Filter

Fluorescence chamber

Electronic circuit

Question 7 of 10

Question 8 of 10

8. In West-Gaeke colourimetric procedure, the intensity of the red purple colour is measured photometically and it is proportional to the concentration of sulphur dioxide. What is the red purple coloured compound?

Ammonia molybdate

Dicholorosulphitomercurate complex

Paraosaniline sulphonic acid

Sodium tetra chloromercurate

Question 8 of 10

Question 9 of 10

9. Which of the following is the normal sampling rate used in nitrogen meters?

3 ml/min

43 ml/min

33 ml/min

13 ml/min

Question 9 of 10

Question 10 of 10

10. The characteristic emission of which colour, when discharge takes place in a low pressure chamber containing gas sample, will indicate the presence of nitrogen while using photospectrometer?

Green

Purple

Blue

Pink

Question 10 of 10