Quality Control Exam |250 Questions
with 100% Verified Answers
1. In the assay of acetic acid (MW = 60.05), each mL of 1N NaOH is equivalent to:
0.60000g of acetic acid
0.00605g of acetic acid
0.60050g of acetic acid
0.06005g of acetic acid - ✔ ✔ D
Chemical analysis, which determines the amount or percentage content of
a certain component in a sample:
Qualitative
Proximate
Quantitative
Gravimetric - ✔ ✔ C
2. One of the fundamental laws in spectrophotometry is:
Law of Mass Action
Beer's Law
Boyle's Law
Newton's law - ✔ ✔ B
,3. The most effective way to clean glass apparatus:
A)Soaking in detergent
Rising with nitric acid
Treatment with a solution of sodium chromate in sulfuric acid
Acetic acid - ✔ ✔ C
4. Potentiometry finds application in:
Biologic assay
pH determination
Qualitative analysis
A and B - ✔ ✔ B
If a 0.2250g of sodium bicarbonate (96.5% NaHCO3) is titrated with 0.1165N
sulfuric acid. What volume of the acid is required to reach the end point? At.Wt.
of Na = 23; H = 1.0; C = 12; O = 16
22.19mL
21.98mL
21.20mL
21.22mL - ✔ ✔ A
, A sample of 0.1350g of arsenic trioxide (As2O3) was assayed iodimetrically
using 23.4mL of 0.1055N iodine solution.The percentage purity of the sample is:
90.44
89.10
90.54
90.23 - ✔ ✔ A
In column chromatography, the separation of the sample mixture into a
series of narrow bands in a column is:
Chromatogram
Eluant
Development
A and C - ✔ ✔ C
In spectrophotometry procedure for assay, aside from the sample or
unknown, this is also required:
Raw material of the sample
Reference
Dosage form
A and C - ✔ ✔ B
. The following conditions cause a reaction to go to completion, except:
, Formation of a gas
Formation of a precipitate
Formation of soluble products
Formation of slightly ionized substances - ✔ ✔ C
0 Beer's plot in spectrometry is prepared to determine:
Absorbance of the sample
Wavelength to be used
Absorbance of the blank
Concentration of the sample - ✔ ✔ D
A plot of absorbance against concentration of a standard drawn in
straight line is:
Charle's
Beer's
Lambert's
B and C - ✔ ✔ B
The study of the optical activity of a substance is:
A) Polarimetry
with 100% Verified Answers
1. In the assay of acetic acid (MW = 60.05), each mL of 1N NaOH is equivalent to:
0.60000g of acetic acid
0.00605g of acetic acid
0.60050g of acetic acid
0.06005g of acetic acid - ✔ ✔ D
Chemical analysis, which determines the amount or percentage content of
a certain component in a sample:
Qualitative
Proximate
Quantitative
Gravimetric - ✔ ✔ C
2. One of the fundamental laws in spectrophotometry is:
Law of Mass Action
Beer's Law
Boyle's Law
Newton's law - ✔ ✔ B
,3. The most effective way to clean glass apparatus:
A)Soaking in detergent
Rising with nitric acid
Treatment with a solution of sodium chromate in sulfuric acid
Acetic acid - ✔ ✔ C
4. Potentiometry finds application in:
Biologic assay
pH determination
Qualitative analysis
A and B - ✔ ✔ B
If a 0.2250g of sodium bicarbonate (96.5% NaHCO3) is titrated with 0.1165N
sulfuric acid. What volume of the acid is required to reach the end point? At.Wt.
of Na = 23; H = 1.0; C = 12; O = 16
22.19mL
21.98mL
21.20mL
21.22mL - ✔ ✔ A
, A sample of 0.1350g of arsenic trioxide (As2O3) was assayed iodimetrically
using 23.4mL of 0.1055N iodine solution.The percentage purity of the sample is:
90.44
89.10
90.54
90.23 - ✔ ✔ A
In column chromatography, the separation of the sample mixture into a
series of narrow bands in a column is:
Chromatogram
Eluant
Development
A and C - ✔ ✔ C
In spectrophotometry procedure for assay, aside from the sample or
unknown, this is also required:
Raw material of the sample
Reference
Dosage form
A and C - ✔ ✔ B
. The following conditions cause a reaction to go to completion, except:
, Formation of a gas
Formation of a precipitate
Formation of soluble products
Formation of slightly ionized substances - ✔ ✔ C
0 Beer's plot in spectrometry is prepared to determine:
Absorbance of the sample
Wavelength to be used
Absorbance of the blank
Concentration of the sample - ✔ ✔ D
A plot of absorbance against concentration of a standard drawn in
straight line is:
Charle's
Beer's
Lambert's
B and C - ✔ ✔ B
The study of the optical activity of a substance is:
A) Polarimetry
