Font size
WorksheetsPharmaceutical analysis- part1+2
Total questions: 45
Worksheet time: 57mins
Described as the number of gram or mole equivalents of solute present in one litre of a solution. When we say equivalent, it is the number of moles of reactive units in a compound.
molarity
ppm
molality
normality
---------------is defined as the moles of a solute per liters of a solution.
Molarity
molality
ppm
normality
Quantitative determination principle in titrimetric methods are based…
On the basis of measurement of
Volume
On the basis of absorbance of
sample
On the basis of pharmacological
response
On the basis of measurement of
conductance
A molal solution contains 1 mole of solute per one
kilogram of solution ( 1 lit. of solvent) is called as
Molality.
molarity
normality
ppm
Volumetric Analysis is a
Qualitative method
Quantitative method
Semi quantitative method
Both A and B
The approximate molecular weight of NaOH is
50g/mol
20g/mol
40g/mol
35g/mol
The quantity of NaOH pellets required to prepare 0.05 M, 100 ml standard solution is
4 g
2 g
0.2 g
0.02 g
Volumetric analysis is a quantitative analysis
False
True
The name of the apparatus used for holding the titrant is__________
Conical flask
Burette
Pipette
Volumetric flask
number of gram equivalent of solute dissolved in 1 litre of solution is
(a)
Which of the following is NOT a property of Primary Standard?
very pure
less reactive
high molecular weight
hygroscopic
It is prepared in the laboratory for a specific analysis. It is usually standardized against a primary standard.
secondary analysis
primary solution
secondary standard
primary standard
Secondary standard are highly pure than primary standard?
true
false
The number of gms of solute per 100 ml of solvent is known as
Normality
% weight by volume
Molality
Mole fraction
What is the requirement for primary standard solution ?
The substance should be unaltered in air during weighing.
The substance should be hygroscopic.
The substance should be hard to obtain.
The substance should have less molecular weight.
How close a measurement is to the true value is called..
Accuracy
Precision
Significant
Estimate
Measurements: 12.3, 14.5, 10.1, 16.9
True Value: 25.0
These measurements are…
Accurate, but not precise
Precise, but not accurate
Both precise and accurate
Neither precise nor accurate
Measurements: 24.9, 25.2, 25.1, 24.8
True Value: 25.0
These measurements are…
Accurate, but not precise
Precise, but not accurate
Both precise and accurate
Neither precise nor accurate
Magnitude of difference between individual and true value of the quantity
Gross error
Percentage error
Relative error
Absolute error
Number of significant figures in 4.0200 is
5
4
3
2
Number of significant figures in 0.009407 is
7
6
4
3
The number of significant digits in 0.032 is
1
2
3
4
The number of significant digits in 410.00720 is
5
6
7
8
An analyst measures the volume of a solution as 8.89ml, but the actual volume is 10ml. Calculate the absolute error and relative error. (Relative error = Absolute error/standard value)
0.11 and 0.111
0.11 and 0.011
1.11 and 0.011
1.11 and 0.111
A person unable to judge the lower meniscus of burette at the endpoint during the titration comes under
Error of the method
Instrumental error
Personal error
Reagent error
Please round-off the value 123.0012 to 3 signifiant digits after decimal:
(a)
Please round-off the value 123.001701 to 3 signifiant digits after decimal:
(a)
