Annamalai University 2011-3rd Year B.Sc Chemistry – APPLIED - Question Paper

UNIT I

1.

(a)

Distinguish precision from accuracy

(4)

(b)

Write a note on minimisation of errors.

(6)

(c)

Discuss the following:

(i) Types of errors.
(ii) Calibration of weights.

(10)

2.

(a)

Differentiate absolute error from relative error.

(4)

(b)

Discuss: significant figures.

(6)

(c)

Write short notes on

(i)                 Mean and standard deviation.

(ii)               Least squares and curve fittings.

(10)

UNIT II

3.

(a)

Explain instrumentation of fluorometry.

(4)

(b)

Write a note on applications of turbidometry.

(6)

(c)

Discuss the following:

(i)                 Principles of polarography.

(ii)               Applications of cyclic voltammetry.

(10)

4.

(a)

What is nephelometry? Give to applications.

(4)

(b)

Explain the instrumentation of cyclic voltammetry.

(6)

(c)

Discuss the principle, instrumentation and applications of coulometry.

(10)

UNIT III

5.

(a)

What is meant by chemical shift? Explain.

(4)

(b)

Write a note on applications of UV spectroscopy.

(6)

(c)

Write short notes on:

(i)                 Spin-spin coupling.

(ii)               Applications of Raman Spectroscopy.

(10)

6.

(a)

What is mutual exclusion principle? Explain.

(4)

(b)

Discus Frank Condon principle.

(6)

(c)

Explain the following:

(i)                 Use of NMR in structure elucidation.

(ii)               Applications of IR spectroscopy.

(10)

UNIT IV

7.

(a)

What is meant by common ion effect? Explain how it is useful in inorganic qualitative analysis?

(4)

(b)

Differentiate iodometric and iodimetric titrations.

(6)

(c)

What is colorimetric estimation? Taking a specific example, explain the use of colorimetric estimation in analytical chemistry.

(10)

8.

(a)

What do you understand by the terms primary and secondary standards?

(4)

(b)

Explain the terms:

(i) Co-precipitation.

(ii) Post-precipitation.

(6)

(c)

Discuss the following in detail

(i)                 Redox titration.

(ii)               Conditions and types of precipitation.

(10)

UNIT V

9.

(a)

State and explain the principle of column chromatography.

(4)

(b)

What are the applications of TLC.

(6)

(c)

Discuss the following:

(i)                 Principles of GC.

(ii)               Applications of PC.

(10)

10.

(a)

State and explain the term R_f.

(4)

(b)

Discuss in detail the applications of column chromatography.

(6)

(c)

Discuss the principle and applications of GC.

(10)