Punjab 12th Class Chemistry Analytical Chemistry Mcqs Test Online

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Question 1 of 20

Chemistry

1. Which method combines the physical separation capabilities of liquid chromatograph with the mass analysis capabilities of mass spectrometry:

1.GE – MS

2.MS

3.NMS

4.LC – MS

Question 1 of 20

Question 2 of 20

2. Mass spectroscopy is an analytical technique which involves:

1.Production of gaseous ions form the sample

2.All of these

3.Separation of the gaseous ions

4.Measurement of the relative abundance of the gaseous ions

Question 2 of 20

Question 3 of 20

3. Which of the following techniques is different from the others as regards the basic principle?

1.Visible spectroscopy

2.Electronic spectroscopy

3.Ultraviolet spectroscopy

4.None of these

Question 3 of 20

Question 4 of 20

4. The position of an infrared absorption band is commonly expressed by:

1.Both of these

2.Wave number

3.Wavelength

4.None of these

Question 4 of 20

Question 5 of 20

5. Which of the following is used as a source of visible radiations?

1.Tungsten filament lamp

2.Hydrogen discharge lamp

3.Deuterium discharge lamp

4.All of these

Question 5 of 20

Question 6 of 20

6. Mass spectrometry can be used to determine:

1.Molecular structure

2.All of these

3.Molecular formula

4.Molecular weight

Question 6 of 20

Question 7 of 20

7. What kind of sample can be studied in a mass spectrometer?

1.A liquid

2.A solid

3.A gas

4.All of these

Question 7 of 20

Question 8 of 20

8. What is the wavelength range of the ordinary infrared region?

1.0.8-2.5 μm

2.400-800 nm

3.800-1000 nm

4.2.5-16 μm

Question 8 of 20

Question 9 of 20

9. Which region of the electromagnetic spectrum is involved in mass spectrometry?

1.Microwave

2.None of these

3.Visible

4.Radio wave

Question 9 of 20

Question 10 of 20

10. Which method combines the feature of gas-liquid chromatography and mass spectrometry:

1.HPLC – MS

2.GC – MS

3.MS

4.LC – MS

Question 10 of 20

Question 11 of 20

11. Which of the following is not used as a source of infrared radiations?

1.Globar

2.Tungsten filament

3.Nernst filament

4.None

Question 11 of 20

Question 12 of 20

12. Far infrared region of the electromagnetic radiation generally lies between:

1.50-1000 nm

2.100-400 nm

3.10-200 nm

4.1-20 nm

Question 12 of 20

Question 13 of 20

13. Which region of the electromagnetic spectrum is involved in the electronic excitations?

1.None of these

2.Visible

3.Both of these

4.Ultraviolet

Question 13 of 20

Question 14 of 20

14. Which kind of information about a positively charged species obtained from a mass spectrum?

1.None of these

2.Molecular weight

3.Relative abundance

4.Both of these

Question 14 of 20

Question 15 of 20

15. Far ultraviolet or vacuum ultraviolet region generally lies between

1.400-750 nm

2.200-400 nm

3.10-200 nm

4.300-500 nm

Question 15 of 20

Question 16 of 20

16. Which of the following techniques does not involve electromagnetic radiations?

1.Infrared spectroscopy

2.Mass spectroscopy

3.All of these involve electromagnetic radiations

4.NMR spectroscopy

Question 16 of 20

Question 17 of 20

17. Which of the following species is detected in the mass spectrometer?

1.Positively charged species

2.Radicals

3.Neutral molecules

4.All of these

Question 17 of 20

Question 18 of 20

18. Which of the following species is produced in the ionization chamber of a mass spectrometer?

1.Positively charges species

2.Radicals

3.All of these

4.Neutral molecules

Question 18 of 20

Question 19 of 20

19. Near ultraviolet region of these electromagnetic spectrum generally lies between:

1.400-750 nm

2.10-200 nm

3.200-400 nm

4.300-500 nm

Question 19 of 20

Question 20 of 20

20. The application of chemistry to criminal investigation is called:

1.Forensic chemistry

2.Physical chemistry

3.Organic chemistry

4.Bio chemistry

Question 20 of 20

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