PHARMACEUTICAL ANALYSIS MCQS - 2

PHARMACEUTICAL ANALYSIS MCQS – 2

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1. Tungsten lamp filament has required how much temperature ?

A. 2000k

B. 3000k

C. 4000k

D. 5000k

2. 2.How much range wavelength is transmit by silicate glass ?

A. 100 nm to 200 nm

B. 200nm to 300 nm

C. 300 nm to 350 nm

D. 10nm to 40 nm

3. 3. what is role of slit in uv-visible spectroscopy ?

A. Monochromatic radiation to polychromatic radiation.

B. Polychromatic radiation to monochromatic radiation.

C. A and B

D. None of this

4. 4. Which radiation source has electrode in its construction ?

A. Tungsten lamp

B. Hydrogen discharge lamp

C. Xenon Discharge Lamp

D. Mercury lamp

5. 5. Which device is used to isolate the radiation of the desired wavelength from wavelength of the continuous spectra ?

A. Monochromator

B. Radiation source

C. Recorder

D. None of this

6. 6. Diffraction grating is consists of a

A. Glass

B. Quartz

C. Alkyl halide

D. All of the above

7. 7. The work of Entrance slit is?

A. To get narrow source

B. To render light parallel

C. To disperse radiation

D. To fall on sample cell

8. 8. Collimator is used for?

A. To reform the image of the entrance slit.

B. To get narrow source

C. To fall on sample cell

D. To disperse radiation

9. 9. Exit slit used for

A. To reform the image of the entrance slit.

B. To get narrow source

C. To fall on sample cell

D. To disperse radiation

10. 10. Which type of vapour is stored in Mercury lamp ?

A. Mercury vapour

B. Hydrogen vapour

C. Xe

D. Ozone

11. Select the wavelength range corresponding to UV-visible region.

(A) 400-800 nm

(B) 200-800 nm

(D) 2.5 μm – 1mm

12. The types of transitions possible in UV-visible region for a compound with molecular formula C ₂H ₄O are

(A) P,Q,R

(B) Q,R

(D) P,Q,R,S

13. If the above compound was completely reduced, what will be the possible transitions it can undergo?

(A) n→p*

(B) s→s*

(D) n→s*, s→s*

14. At alkaline pH, phenol loses one proton and exists as phenoxide anion as shown below. Select the correct statement regarding their absorption.

(A) Phenol shows more absorption than phenoxide anion

(B) Phenoxide anion shows more absorption than phenol

(D) Phenol shows absorption but phenoxide anion doesn’t

15. The λmax in α,β-unsaturated acids can be determined by

(A) Wood ward fieser

(B) Nielsen rules

(D) All of the above

16. Which of the following spectroscopy techniques is associated with molecular emission?

(A) UV-Visible spectroscopy

(B) IR spectroscopy

(D) X-ray diffraction

17. The primary band in aromatic compounds are observed at

(A) 241

(B) 215

(D) 184

18. Beer Lambert’s law gives the relation between which of the following?

a) Reflected radiation and concentration

b) Scattered radiation and concentration

c) Energy absorption and concentration

d) Energy absorption and reflected radiation

19. In which of the following ways, absorption is related to transmittance?

a) Absorption is the logarithm of transmittance

b) Absorption is the reciprocal of transmittance

c) Absorption is the negative logarithm of transmittance

d) Absorption is a multiple of transmittance

20. Which of the following is not a limitation of Beer Lambert’s law, which gives the relation between absorption, thickness, and concentration?

a) Concentration must be lower

b) Radiation must have higher bandwidth

c) Radiation source must be monochromatic

d) Does not consider factors other than thickness and concentration that affect absorbance

21. Beer’s law states that the intensity of light decreases with respect to ___________

a) Concentration

b) Distance

c) Composition

d) Volume

22. Lambert’s law states that the intensity of light decreases with respect to __________