CHEMISTRY QUESTION BANK
UNIT –I :: ELECTROCHEMISTRY AND BATTERIES
PART-A: SHORT ANSWER QUESTIONS
1 What is salt bridge? What is its role in Galvanic cell?
Calculate the single electrode potential of Cu dipped 0.01M CuSO4 Solution, the given
2
E0 cu/cu+2 = 0.34V.
3 Differentiate between primary and secondary batteries.
4 Explain the determination of pH using Quinhydrone electrode?
Write the cell reaction and calculate the emf of the following cell at 250C: Zn(s) l
5 Zn2+(0.001M) ll Ag+(0.0001M) l Ag(s)
2+ 0 +
Given E0Zn /Zn= -0.76 V and E Ag /Ag = 0.80 V.
6 Calculate the Standard EMF of a cell containing Sn +2 / Sn and Br2 / Br-
EO Sn +2 / Sn = - 0.14 V and EO Br2 / Br - = 1.08 V
PART-B: LONG ANSWER QUESTIONS
Explain the following electrodes with their electrode reaction, potential with well
labeled diagram
1 a) Calomel electrode (Metal-Metal insoluble salt electrode)
b) Quinhydrone electrode
c) Glass electrode
2 Derive Nernst equation? Give its applications.
Write cell notation, cell reaction and calculate the emf of Daniel cell in
3 which Zn is dipped in 0.01M ZnSO4 and Cu is immersed in 0.001M CuSO4 solution,
the given E0Zn2+/Zn=-0.76 V and E0Cu2+/Cu = 0.34 V.
Describe the construction and working of dry cell (zinc-carbon) with relevant
4
reactions.
Describe the construction of Lead -Acid battery with reactions occurring during
5
Discharging and Charging?
6 Write a note on Li - ion secondary cells.
What are fuel cells? Describe in detail the working of hydrogen-oxygen cells? Write its
7
applications.
UNIT –II:: WATER CHEMISTRY AND CORROSION
PART-A: SHORT ANSWER QUESTIONS
S.NO QUESTION
1 What do you mean by hardness of water? How is it classified?
What is demineralization of hard water? How is exhausted ion- exchange resins
2
regenerated?
3 What is corrosion? Differentiate dry corrosion and wet corrosion?
4 Write short notes on: (i) Waterline corrosion, (ii) Pitting corrosion.
PART-B: LONG ANSWER QUESTIONS
S.NO QUESTION
1 Describe the estimation of hardness of water sample by EDTA Method.
2 Discuss the water softening by ion – exchange process
3 What is reverse osmosis? How is sea water purified by this method?
4 What are the specifications of potable water?
5 What is meant by sterilization of water? Explain how sterilization of water is carried out by
using break point chlorination
Define corrosion. Explain dry corrosion and its mechanism.
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7 Describe the mechanism of electrochemical (wet) corrosion.
8 List out and discuss the various factors influencing rate of corrosion
9 A sample of water is found to contains following dissolving salts in milligrams
per litre Mg(HCO3)2 = 73, CaCl2 = 111, Ca(HCO3)2 = 81, MgSO4 = 40 and
MgCl2 = 95. Calculate temporary and permanent hardness and total hardness
UNIT –III ENGINEERING MATERIALS
PART-A: SHORT ANSWER QUESTIONS
S.NO QUESTION
Define the following terms polymer and monomer with suitable examples.
1
2 Differentiate between thermoplastic and thermosetting polymers.
3 What are conducting polymers? Give their applications?
4 Write mechanism of conduction in polyacetylene?
PART-B: LONG ANSWER QUESTIONS
S.NO QUESTION
Explain addition, condensation and co-polymerization reactions with examples.
1
Write the preparation, properties and uses of following:
2
i) PVC ii) Bakelite iii) Nylon-6,6
Discuss preparation, properties and uses of following rubbers:
3
a) Buna-S b) Butyl rubber
4 Write preparation, properties and uses of polylactic acid? (PLA)
UNIT –IV CHEMICAL FUELS
PART-A: SHORT ANSWER QUESTIONS
S.NO QUESTION
What are chemical fuels? Give complete classification of chemical fuels with examples.
1
2 Distinguish between gross (HCV) and net calorific(LCV) value.
3 What is cracking? Give its significance.
Write short notes on:
4
i) Octane number, ii) Cetane number, iii) LPG, iv) CNG.
PART-B: LONG ANSWER QUESTIONS
S.NO QUESTION
1 Mention the criteria for selecting (requirements) good fuel.
2 Explain the proximate analysis of coal? What is its significance?
3 Discuss the ultimate analysis of coal and its significance.
Composition of gasoline, diesel and kerosene.
4
Describe the method of moving bed catalytic cracking with a neat labeled diagram.
5
1. Calculate the gross (HCV) and net (LCV) colorific values of coal having the following
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compositions, C = 70 %, O = 8 %, H = 10 %, N = 3 %, S = 2%, Ash = 7 %. Latent heat of
steam = 587 Kcal/kg.
2. Calculate the gross (HCV) and net (LCV) colorific values of coal having the following
compositions: C – 85%, H = 8%, S = 1%, N = 2%, and ash 4%. Latent heat of steam = 587
Kcal/kg.
UNIT –V: SPECTROSCOPY & GREEN CHEMISTRY
PART-A: SHORT ANSWER QUESTIONS
S.NO QUESTION
1
Define Bathochromic & Hypsochromic shifts with one example.
2
Define Hyperchomic & Hypochromic shifts with one example
3
Discuses the applications of UV Sensors in Phototheraphy.
4
Write short note on: a) Atom economy b) Catalysis.
5
Relate any two examples for clean technology?
PART-B: LONG ANSWER QUESTIONS
S.NO QUESTION
1
Verify Beer-Lambert’s law ? Explain absorption & intensity shifts ?
2 Principles and applications of UV sensors?
3 Write a note on chemical shift & multiplicity?
4 Principles and applications of IR sensors?
5 What is green chemistry? Discuss the twelve principles of green chemistry
