Punjab 12th Class Chemistry Analytical Chemistry Mcqs Test Online

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Question 1 of 20

Chemistry

1. Mass spectroscopy is an analytical technique which involves:

1.Separation of the gaseous ions

2.All of these

3.Measurement of the relative abundance of the gaseous ions

4.Production of gaseous ions form the sample

Question 1 of 20

Question 2 of 20

2. Far ultraviolet or vacuum ultraviolet region generally lies between

1.200-400 nm

2.300-500 nm

3.400-750 nm

4.10-200 nm

Question 2 of 20

Question 3 of 20

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

1.Positively charges species

2.All of these

3.Radicals

4.Neutral molecules

Question 3 of 20

Question 4 of 20

4. 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 4 of 20

Question 5 of 20

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

1.Organic chemistry

2.Physical chemistry

3.Forensic chemistry

4.Bio chemistry

Question 5 of 20

Question 6 of 20

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

1.Visible spectroscopy

2.None of these

3.Ultraviolet spectroscopy

4.Electronic spectroscopy

Question 6 of 20

Question 7 of 20

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

1.All of these

2.Hydrogen discharge lamp

3.Tungsten filament lamp

4.Deuterium discharge lamp

Question 7 of 20

Question 8 of 20

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

1.HPLC – MS

2.GC – MS

3.MS

4.LC – MS

Question 8 of 20

Question 9 of 20

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

1.Radio wave

2.None of these

3.Visible

4.Microwave

Question 9 of 20

Question 10 of 20

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

1.10-200 nm

2.300-500 nm

3.200-400 nm

4.400-750 nm

Question 10 of 20

Question 11 of 20

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

1.Ultraviolet

2.None of these

3.Both of these

4.Visible

Question 11 of 20

Question 12 of 20

12. 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 12 of 20

Question 13 of 20

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

1.A liquid

2.A gas

3.All of these

4.A solid

Question 13 of 20

Question 14 of 20

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

1.Both of these

2.None of these

3.Wavelength

4.Wave number

Question 14 of 20

Question 15 of 20

15. Mass spectrometry can be used to determine:

1.Molecular weight

2.All of these

3.Molecular structure

4.Molecular formula

Question 15 of 20

Question 16 of 20

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

1.800-1000 nm

2.0.8-2.5 μm

3.2.5-16 μm

4.400-800 nm

Question 16 of 20

Question 17 of 20

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

1.None

2.Globar

3.Tungsten filament

4.Nernst filament

Question 17 of 20

Question 18 of 20

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

1.Positively charged species

2.Neutral molecules

3.Radicals

4.All of these

Question 18 of 20

Question 19 of 20

19. 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 19 of 20

Question 20 of 20

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

1.MS

2.LC – MS

3.GE – MS

4.NMS

Question 20 of 20

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