STUPIDSID
1
Construct a cell with Fe and Mg at standard conditions and calculate the Emf developed. Given: Eo (Fe2+/Fe)=0.44 V and Eo (Mg2+/Mg)=-2.37 V.
2 M
2
Zinc reacts with dilute H2SO4 to give hydrogen but Ag does not- Explain.
2 M
3
Mention the types of corrosion.
2 M
4
What are organic inhibitors? What will be reason for the increase in inhibiting power of aliphatic amines in the following given order? NH3 < RNH3 < R2NH < R3N.
2 M
5
The ultimate analysis of a coal sample indicates Carbon =84%, Sulphur=1.5%, Nitrogen=0.6%, Hydrogen=5.5% and Oxygen=8.4%. Calculate the GCV.
2 M
6
Write the expression for the amount of air required for combustion of 1 kg fuel.
2 M
7
NH4Cl(s)⇔ NH3(g)+HCl(g). How many phases, components and degrees of freedom are available in this equilibrium?
2 M
8
Write the chemical compositions of Dutch metal and Gun metal.
2 M
9
Mention any two applications of UV spectroscopy.
2 M
10
State the principle involved in colorimetric analysis.
2 M
Answer any one question from Q11 (a) & Q11 (b)
11 (a) (i)
What is an ion selective electrode? Explain its principle and working.
6 M
11 (a) (ii)
Derive an expression for Nernst equation. The emf of a cell measured by means of a hydrogen electrode against a saturated calomel electrode at 298 K is 0.4188 V. If the pressure of the H2(g) was maintained at 1 atm, calculate the pH of the unknown solution, given the potential of reference calomel electrode is 0.2415 V.
10 M
11 (b)(i)
Draw the conductometric titration curve of stronge acid versus strong base and explain it.
4 M
11 (b)(ii)
Explain with suitable examples any two applications of emf series.
4 M
11 (b)(iii)
Explain the potentiometric titration of FeSO4 vs K2Cr2O7 with a neat diagram.
8 M
Answer any one question from Q12 (a) & Q12 (b)
12 (a) (i)
State the differences between chemical corrosion and electrochemical corrosion.
6 M
12 (a) (ii)
Write a detailed note on cathodic protection methods.
10 M
12 (b) (i)
Discuss the various steps involved in electroless nickel plating.
8 M
12 (b) (ii)
Explain the different types of inhibitors used to control the corrosion rate.
8 M
Answer any one question from Q13 (a) & Q13 (b)
13 (a)(i)
How is metallurgical coke manufactured by Otto Hoffmann's method? What are the important by products recovered from coke oven gas?
8 M
13 (a)(ii)
Describe the significance of ultimate analysis of coal.
4 M
13 (a)(iii)
List the fractions of hydrocarbons collected between boiling range of 30°C-400°C by fractional distillation of crude oil.
4 M
13 (b) (i)
What is hydrogenation of coal? Write the Fischer-Tropsh process of manufacture of liquid fuels from solid fuels.
8 M
13 (b) (ii)
Write in detail chemical reactions involved in the manufacture of producer gas and mention its chemical composition.
8 M
Answer any one question from Q14 (a) & Q14 (b)
14 (a) (i)
State phase rule and explain the terms involved.
8 M
14 (a) (ii)
Draw and explain the phase diagram of two component system with an example.
8 M
14 (b) (i)
Write short notes on any four methods of heat treatment of steel.
8 M
14 (b) (ii)
Give the composition and uses of the following alloys
(1) Nichrome
(2) Stainless steel
(3) Brass
(4) Bronze.
(1) Nichrome
(2) Stainless steel
(3) Brass
(4) Bronze.
8 M
Answer any one question from Q15 (a) & Q15 (b)
15 (a) (i)
Write the principle of UV spectroscopy.
6 M
15 (a) (ii)
Write the mechanism of interaction between the vibrating molecule and infra-red radiation.
6 M
15 (a) (iii
A solution of thickness 2 cm. Transmitted 40% incident light. Calculate the concentration of this solution, give that the molar absorptivity is 6000 dm2 mol-1 cm-1
6 M
15 (b) (i)
Explain briefly the principle of a flame photometer. A sample solution is found contain KCL and NaCI. How will you determine the amount of NaCI alone present in the solution using a flame photometer?
10 M
15 (b) (ii)
Compare: Flame photometry and Atomic absorption spectroscopy.
6 M
More question papers from Engineering Chemistry 2