Pharmaceutical Analysis Test 2

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| By Anilkumarpharmac

Anilkumarpharmac

Community Contributor

Quizzes Created: 2 | Total Attempts: 12,657

Questions: 6 | Attempts: 4,304 | Updated: Mar 22, 2023

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It is about titrations

Questions and Answers

1.

In which of the following titration “oxidation-reduction ‘(Redox) step can be expected
- A.
  
  Acid-base titrations
- B.
  
  Ceriometry
- C.
  
  Gay-lussac method
- D.
  
  Aquametry.
- E.
  
  Kjeldhal titration
Correct Answer
B. Ceriometry

Explanation
Ceriometry is a titration method that involves the determination of cerium ions in a solution. In this method, the oxidation-reduction (redox) step can be expected because cerium ions can exist in different oxidation states, such as Ce3+ and Ce4+. The redox reaction occurs between the cerium ions and the titrant, which is usually a reducing or oxidizing agent. This reaction allows for the determination of the concentration of cerium ions in the solution. Therefore, in the process of ceriometry, the oxidation-reduction step is involved.

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2.

which of the following is volumetry
- A.
  
  Potentiometry
- B.
  
  Voltametry
- C.
  
  Gravy metry
- D.
  
  Gasometry
- E.
  
  Amperometry
Correct Answer
D. Gasometry

Explanation
Gasometry is the correct answer because it refers to the measurement of the volume or quantity of gases. Potentiometry, voltametry, gravy metry, and amperometry are not related to the measurement of gas volume.

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3.

Formality is a term for expressing the concentration and used in
- A.
  
  spectrophotometric reactions
- B.
  
  acid-base reactions
- C.
  
  argentometric reactions
- D.
  
  precipitation reactions
- E.
  
  Redox titrations
Correct Answer
D. precipitation reactions

Explanation
Formality is a term used to express the concentration in various types of reactions. In this case, it is specifically used in precipitation reactions. Precipitation reactions involve the formation of a solid product from the reaction of two aqueous solutions. The formality of a solution in a precipitation reaction refers to the number of formula units of the solute present in one liter of the solution. Therefore, the correct answer is precipitation reactions.

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4.

Saccharimetry is the practical application of
- A.
  
  Acidimetry
- B.
  
  Alkalimetry
- C.
  
  Potetiometry
- D.
  
  Polarimetry
- E.
  
  Aquametry
Correct Answer
D. Polarimetry

Explanation
Polarimetry is the practical application of saccharimetry. Polarimetry is a technique used to measure the rotation of plane-polarized light as it passes through a sample. In saccharimetry, polarimetry is used to determine the concentration of sugar in a solution by measuring the rotation of polarized light caused by the presence of sugar molecules. Therefore, polarimetry is the correct answer as it directly relates to saccharimetry and its practical application.

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5.

CO₂ not identified by IR spectroscopy it’s due to
- A.
  
  CO2 has no dipole moment although C=O is polar
- B.
  
  CO2 has no dipole moment since C=O is non-polar
- C.
  
  Optical activity of the system
- D.
  
  Both (a) and (c
- E.
  
  Both (b) and (c)
Correct Answer
A. CO2 has no dipole moment although C=O is polar

Explanation
The correct answer is "CO2 has no dipole moment although C=O is polar." This is because although the C=O bond in CO2 is polar due to the difference in electronegativity between carbon and oxygen, the molecule as a whole is linear and symmetrical, resulting in the dipole moments of the two C=O bonds canceling each other out. As a result, CO2 does not have a net dipole moment and cannot be identified by IR spectroscopy, which relies on the detection of molecular vibrations associated with a changing dipole moment.

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6.

Absorption of a radiation is a measurement in
- A.
  
  NMR & ESR
- B.
  
  Flame photometry
- C.
  
  Radiometric method
- D.
  
  Raman spectroscopy.
- E.
  
  None
Correct Answer
A. NMR & ESR

Explanation
NMR (Nuclear Magnetic Resonance) and ESR (Electron Spin Resonance) are spectroscopic techniques that involve the absorption of radiation. NMR is used to study the interaction of atomic nuclei with an applied magnetic field, while ESR is used to study the interaction of unpaired electrons with a magnetic field. Both techniques rely on the absorption of specific frequencies of radiation by the sample being analyzed. Therefore, NMR & ESR is the correct answer as both methods involve the absorption of radiation.

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Pharmaceutical Analysis Test 2

In which of the following titration “oxidation-reduction ‘(Redox) step can be expected

which of the following is volumetry

Formality is a term for expressing the concentration and used in

Saccharimetry is the practical application of

CO2 not identified by IR spectroscopy it’s due to

Absorption of a radiation is a measurement in

CO₂ not identified by IR spectroscopy it’s due to