Pharmaceutical Analysis Most Important 50 MCQs with Solutions
Pharmaceutical Analysis-1 1st Semester Most Important MCQs
Multiple Choice Questions
1.The quantitative analysis is also called as
a. Assay
b. Estimation
c. Quality control
d. Identification
2.In quantitative analysis errors may be of…. types
a. 3
b. 2
c. 4
d. 5
3.The error which can be avoided and whose magnitude can be measured is:
a. Random error
b. Systematic error
c. Systematic random error
d. All of the above
4.The absolute error divided by true value is:
a. Relative error
b. Random error
c. Determinant error
d. Both b and c
5.The difference between measured value and true value is
a. Precision
b. Accuracy
c. both a and b
d. Reproducibility
7.High degree of precision…..:
a. Implies high accuracy
b. May not imply accuracy
c. Always implies high accuracy
d. Implies always true and accurate value
8.The measure of precision is:
a. Mean
b. Standard deviation
c. Variance and RSD
d. All of the above
9.Spectroscopy of deals with electromagnetic radiation with matter. What will be speed of this radiation in vacuum in m/s?
a. 6 x 10⁸
b. 5 x 10⁸
c. 7 x 10⁸
d. 3 x 10⁸
10.Which of the following is NOT a property or parameter of electromagnetic radiation?
a. Wavelength
b. Voltage
c. Wave number
d. Amplitude
11.Electromagnetic radiation……. through vacuum.
a. Can travel
b. Cannot travel
c. Both a and b
d. Reflect
12.Which of the following is false about wavelengths of electromagnetic radiation?
a. Radiation with short wavelengths has high energy
b. Energy does not depend on wavelength
c. Radiation with long wavelengths has low energy
d. Energy depends on wavelength
13.Energy absorbed in UV region produces changes in:
a. The rotational energy of the molecule
b. The vibrational energy of the molecule
c. The electronic energy of the molecule
d. All the three energy levels of the molecule
14.Velocity of electromagnetic radiation is……. in vacuum than in any medium.
a. More
b. Less
c. Equal
d. Decreased
15.The absorbance spectrum of the compound is characteristics of that compound, it constitutes the
a. Chemical property
b. Electronic property
c. Magnetic property
d. Physical property
16.Beer’s 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
17.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
18.Beer’s law establishes the relationship between:
a. Absorbance and concentration
b. Concentration and transmittance
c. Absorbance and wavelength
d. Wavelength and concentration
19.What is the unit of absorbance which can be derived from Beer Lambert’s law?
a. L mol-¹cm-¹
b. Lgm-¹cm-¹
c. Cm
d. No unit
20.A moiety of molecules responsible for selective absorption of radiation in a specific range is called…
a. Auxochrome
b. Chromophore
c. Bathochrome
d. Hypsochrome
21.UV spectroscopic analysis is based on:
a. Absorption of UV light
b. Absorption of radio wave
c. Absorption of visible light
d. Absorption of infra-red
22.The entire ultraviolet spectrum in spectrophotometric method of analysis ranges between:
a. More than 760 nm
b. 200nm to 400nm
c. 400 nm-760 nm
d. None of the above
23.Which statement is correct?
a. Wave number is directly proportional to energy
b. Wave length is directly proportional to frequency
c. Wave number is directly proportional to wavelength
d. Wavelength is directly proportional to energy
24.The wavelength of absorption is 495 nm. In which region ofthe electromagnetic spectrum does this lie?
a. Radio wave
b. UV-visible
c. Infrared
d. Microwave
25.What is the name of an instrument used to measure the absorbance of a colored compound in solution?
a. Calorimeter
b. Colorimeter
c. Coulometer
d. Colormeter
26.What is red shift?
a. The shifting of absorption to higher energy
b. The shifting of absorption towards the blue end of spectrum
c. The shifting of absorption to shorter wavelength
d. The shifting of absorption to lower energy
27.What is chromophore?
a. A colored compound
b. A group of atoms in a compound responsible for absorption of electromagnetic radiation
c. A group of atoms in a colored compound
d. A group of atoms in a compound responsible for electromagnetic radiation
28.Bathochromic shift is….:
a. Shift towards shorter wavelength
b. Shift towards longer wavelength
c. Shift towards blue light
d. all of the above
29.Blue shift is…:
a. Shift towards yellow light
b. Shift towards longer wavelength
c. Shift towards shorter wavelength
d. none of the above
30.A monochromator is:
a. Used as a source of electromagnetic radiation
b. A sample compartment
c. A recorder
d. Used to isolate a particular wavelength
31.Which of the following is the principle chromophore in an azo dye?
a. N= N
b. C= N
c. N=N
d. C=N
32.Lycopene (max= 469 nm) is present in tomatoes, what color of light does lycopene absorb?
a. Blue
b. Red
c. Orange
d. Green
33.Which of the following absorption maxima is NOT in the visible range of electronic spectrum?
a. Amax= 750 nm
b. Amax=480 nm
c. Amax= 550 nm
d. Amax 250 nm
34.UV-visible spectroscopy of organic compound is with concerned electronic usually transitions of:
a. S-S*
b. n→ S*
с. n→ π* and →*
d. None
35.Concentration of a colorless organic sample can be determined by….:
a. Using a UV spectrophotometer
b. Using a Visible spectrophotometer
c. Either a UV or a Visible spectrophotometer
d. Using an indicator solution and pH meter
36.In the equation, A = Ebc, what quantity is represented by “e”?
a. Absorptivity
b. Molar absorptivity
c. Path length
d. None
37.Visible absorptions are …… than UV absorptions.
a. Weaker
b. Stronger
c. Both
d. None
38.Which of the following components of a UV- visible spectrometer is used to focus the light from lamp into a single beam?
a. Monochromator
b. Slit
c. Cuvette
d. Mirror
39.The correct order of increasing frequency of the following types of electromagnetic radiation is:
a. Radio<UV< Visible < x-ray
b. Radio < Visible < UV <X ray
c. X-ray <UV < Visible < radio
d. None
40.Absorbance occurs at:
a. All wavelength in spectrum
b. A characteristic wavelength dependent on the molecule
c. The UV region
d. The visible region
41.In UV radiation changes takes place in….
a. Within atomic nuclei
b. In inner electrons
c. In valence electrons
d. Molecular vibration
42.Which Spectrophotometer is relatively inexpensive?
a. Single beam
b. Double beam
c. Both are same
d. None
43.In normal phase chromatography stationary phase is:
a. Non- Polar
b. Polar
c. Neutral
d. None of the above
44.Stationary phase of column chromatography should…
a. Have uniform size distribution
b. Have mechanical stability
c. Be inert
d. All of the above
45.The most popular thickness layer in TLC is:
a. 2 mm
b. 0.25 mm
c. 0.5 mm
d. 0.75 mm
46…is a weak adsorbent used in column chromatography.
a. Sucrose
b. Calcium carbonate
c. Activated magnesium silicate
d. Fullers earth
47.Chances of air bubble entrapment occurs in…. of column chromatography:
a. Wet packing technique
b. Dry packing technique
c. Both techniques
d. All of the above
48.Which of the following factors affect the column efficiency of column chromatography?
a. Dimension of column
b. Particle size of adsorbant
c. Temperature of the column
d. All of the above
49.Silica gel is used in most of the absorbant columns which contains-OH groups. So it is…. in nature.
a. Slightly basic
b. neutral
c. Slightly acidic
d. Both acidic and basic
50.Thin layer chromatography is.
a. Partition chromatography
b. Electrical mobility of ionic species
c. Adsorption chromatography
d. None of the above
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