Punjab 12th Class Chemistry Analytical Chemistry Mcqs Test Online

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Question 1 of 20

Chemistry

1. Mass spectrometry can be used to determine:

1.All of these

2.Molecular structure

3.Molecular formula

4.Molecular weight

Question 1 of 20

Question 2 of 20

2. Mass spectroscopy is an analytical technique which involves:

1.Measurement of the relative abundance of the gaseous ions

2.Separation of the gaseous ions

3.All of these

4.Production of gaseous ions form the sample

Question 2 of 20

Question 3 of 20

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

1.All of these

2.Positively charged species

3.Radicals

4.Neutral molecules

Question 3 of 20

Question 4 of 20

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

1.200-400 nm

2.10-200 nm

3.300-500 nm

4.400-750 nm

Question 4 of 20

Question 5 of 20

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

1.NMR spectroscopy

2.Mass spectroscopy

3.All of these involve electromagnetic radiations

4.Infrared spectroscopy

Question 5 of 20

Question 6 of 20

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

1.None of these

2.Wave number

3.Wavelength

4.Both of these

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

2.800-1000 nm

3.400-800 nm

4.2.5-16 μm

Question 7 of 20

Question 8 of 20

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

1.None of these

2.Ultraviolet

3.Visible

4.Both of these

Question 8 of 20

Question 9 of 20

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

1.GC – MS

2.LC – MS

3.HPLC – MS

4.MS

Question 9 of 20

Question 10 of 20

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

1.All of these

2.Hydrogen discharge lamp

3.Deuterium discharge lamp

4.Tungsten filament lamp

Question 10 of 20

Question 11 of 20

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

1.MS

2.LC – MS

3.NMS

4.GE – MS

Question 11 of 20

Question 12 of 20

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

1.Radicals

2.Positively charges species

3.Neutral molecules

4.All of these

Question 12 of 20

Question 13 of 20

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

1.Globar

2.None

3.Nernst filament

4.Tungsten filament

Question 13 of 20

Question 14 of 20

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

1.Physical chemistry

2.Bio chemistry

3.Forensic chemistry

4.Organic chemistry

Question 14 of 20

Question 15 of 20

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

1.Microwave

2.Radio wave

3.None of these

4.Visible

Question 15 of 20

Question 16 of 20

16. Far ultraviolet or vacuum ultraviolet region generally lies between

1.300-500 nm

2.200-400 nm

3.10-200 nm

4.400-750 nm

Question 16 of 20

Question 17 of 20

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

1.Molecular weight

2.Relative abundance

3.None of these

4.Both of these

Question 17 of 20

Question 18 of 20

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

1.All of these

2.A liquid

3.A gas

4.A solid

Question 18 of 20

Question 19 of 20

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

1.Ultraviolet spectroscopy

2.Electronic spectroscopy

3.Visible spectroscopy

4.None of these

Question 19 of 20

Question 20 of 20

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

1.50-1000 nm

2.100-400 nm

3.1-20 nm

4.10-200 nm

Question 20 of 20

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