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.Measurement of the relative abundance of the gaseous ions

3.Production of gaseous ions form the sample

4.All of these

Question 1 of 20

Question 2 of 20

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

1.Radicals

2.All of these

3.Neutral molecules

4.Positively charges species

Question 2 of 20

Question 3 of 20

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

1.Infrared spectroscopy

2.NMR spectroscopy

3.All of these involve electromagnetic radiations

4.Mass spectroscopy

Question 3 of 20

Question 4 of 20

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

1.Visible

2.None of these

3.Microwave

4.Radio wave

Question 4 of 20

Question 5 of 20

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

1.None

2.Nernst filament

3.Tungsten filament

4.Globar

Question 5 of 20

Question 6 of 20

6. Far ultraviolet or vacuum ultraviolet region generally lies between

1.400-750 nm

2.10-200 nm

3.200-400 nm

4.300-500 nm

Question 6 of 20

Question 7 of 20

7. 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 7 of 20

Question 8 of 20

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

1.A solid

2.A liquid

3.A gas

4.All of these

Question 8 of 20

Question 9 of 20

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

1.Visible spectroscopy

2.None of these

3.Electronic spectroscopy

4.Ultraviolet spectroscopy

Question 9 of 20

Question 10 of 20

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

1.Forensic chemistry

2.Bio chemistry

3.Organic chemistry

4.Physical chemistry

Question 10 of 20

Question 11 of 20

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

1.Relative abundance

2.Both of these

3.None of these

4.Molecular weight

Question 11 of 20

Question 12 of 20

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

1.None of these

2.Visible

3.Ultraviolet

4.Both of these

Question 12 of 20

Question 13 of 20

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

1.MS

2.LC – MS

3.GC – MS

4.HPLC – MS

Question 13 of 20

Question 14 of 20

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

1.300-500 nm

2.400-750 nm

3.200-400 nm

4.10-200 nm

Question 14 of 20

Question 15 of 20

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

1.All of these

2.Deuterium discharge lamp

3.Tungsten filament lamp

4.Hydrogen discharge lamp

Question 15 of 20

Question 16 of 20

16. 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 16 of 20

Question 17 of 20

17. Mass spectrometry can be used to determine:

1.Molecular formula

2.Molecular structure

3.Molecular weight

4.All of these

Question 17 of 20

Question 18 of 20

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

1.NMS

2.LC – MS

3.MS

4.GE – MS

Question 18 of 20

Question 19 of 20

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

1.Wavelength

2.Wave number

3.Both of these

4.None of these

Question 19 of 20

Question 20 of 20

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

1.100-400 nm

2.50-1000 nm

3.1-20 nm

4.10-200 nm

Question 20 of 20

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