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.LC – MS

2.GE – MS

3.NMS

4.MS

Question 1 of 20

Question 2 of 20

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

1.Both of these

2.None of these

3.Ultraviolet

4.Visible

Question 2 of 20

Question 3 of 20

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

1.MS

2.HPLC – MS

3.LC – MS

4.GC – MS

Question 3 of 20

Question 4 of 20

4. 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 4 of 20

Question 5 of 20

5. 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 5 of 20

Question 6 of 20

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

1.2.5-16 μm

2.400-800 nm

3.800-1000 nm

4.0.8-2.5 μm

Question 6 of 20

Question 7 of 20

7. Mass spectrometry can be used to determine:

1.Molecular structure

2.Molecular weight

3.All of these

4.Molecular formula

Question 7 of 20

Question 8 of 20

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

1.Neutral molecules

2.All of these

3.Positively charges species

4.Radicals

Question 8 of 20

Question 9 of 20

9. Mass spectroscopy is an analytical technique which involves:

1.Production of gaseous ions form the sample

2.All of these

3.Measurement of the relative abundance of the gaseous ions

4.Separation of the gaseous ions

Question 9 of 20

Question 10 of 20

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

1.None of these

2.Visible spectroscopy

3.Electronic spectroscopy

4.Ultraviolet spectroscopy

Question 10 of 20

Question 11 of 20

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

1.10-200 nm

2.1-20 nm

3.100-400 nm

4.50-1000 nm

Question 11 of 20

Question 12 of 20

12. 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 12 of 20

Question 13 of 20

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

1.10-200 nm

2.400-750 nm

3.200-400 nm

4.300-500 nm

Question 13 of 20

Question 14 of 20

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

1.Wavelength

2.None of these

3.Both of these

4.Wave number

Question 14 of 20

Question 15 of 20

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

1.Radicals

2.Neutral molecules

3.Positively charged species

4.All of these

Question 15 of 20

Question 16 of 20

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

1.Hydrogen discharge lamp

2.All of these

3.Deuterium discharge lamp

4.Tungsten filament lamp

Question 16 of 20

Question 17 of 20

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

1.Both of these

2.Relative abundance

3.Molecular weight

4.None of these

Question 17 of 20

Question 18 of 20

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

1.Radio wave

2.Microwave

3.Visible

4.None of these

Question 18 of 20

Question 19 of 20

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

1.Tungsten filament

2.None

3.Nernst filament

4.Globar

Question 19 of 20

Question 20 of 20

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

1.Organic chemistry

2.Physical chemistry

3.Forensic chemistry

4.Bio chemistry

Question 20 of 20

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