BSc Sem V 2015 2016 2016 Chemistry 1 Question Paper - Mumbai University | munotes

of log table non-programmable calculator is allowed
Give an account of minimisation of determinate errors. 5
Analysis of an ore for copper content gave the following results 5
calculate relative average from mean in
C) a) Explain the purpose of sampling. 2
D) Discuss the sampling of heterogeneous liquids flowing liquide. 5
Inthe gravimetric estimation of nickel, foll@ results were obtained 5
Sample No. | Weight of sample nickel
If the sample nickel, calculate :
i) absolute error,
F) Describe methods used for sampling of solids. 5
Answer of the following: 15
A) the nature of titration curve in the titration of strong acid against
a neat diagram of a single beam spectrophotometer. Write the
function of different components
Discuss method for the determination of end point
(A) Fillinthe blanks. 4
bs a) The difference between the highest and the lowest numerical value in
the set of measurements is called L
b) which cannot be easily determined are called
Insampling, different are mixed to give grosssample
# d) Sampling of air is called sampling
(A) State true or false. 4
p) Inconstant errors, the relative error remains constant. x
q) Precision represents reproducibility of the
Accuracy is expressed in terms of standard deviation
s) Hydrofluoric acid is used to dissolve silicate rock
(B) Fill in the blanks. 4
a) Fordetermination of end point in an acid base an reagent used
is known as
b) Prism is used as in
c) is formed as a second in Mohr's method
(B) State true or false. 4
p) Ferric alum is used as an in Volhard's method
q) InUV-Visible only quartz cuvettes are used in visible
rt) Methyl orange as an indicator for titration of
s) Ina gratings are advantageous as they can be used
(C) Fill in the 4
a) In chgomatographic separations, the mobile phase may be gas or
"Ge position of spot in chromatogram is indicated by
Insolvent extraction, the chosen organi
in the aqueous phase
d) The best possible separation i
D, values, is given
(C) State true or false
p) Methods involving thin, flat system such as TLC are called planar
q) R,vlaue depends on the temperature
t) Nernst distribution law can be mathematically expressed as
s) Batch extraction method is preferred when solute has small
(D) Fill in the blanks. w 3
a) Secondary filter in fluorimetry absorbs light
b) The instrument used to measure turbidance is known
Onlya small portion of sample reaches the
in flame photometry,
(D) State true or false
p) Fluorescence is anisotropic property, 3
q) Fluorescence is delayed
t) Aseparate lamp is required for th
of each element inAAS