BSc. Chemistry-II : Physical Chemistry -Mumbai-April 2017
MUMBAI UNIVERSITY
Subject: Chemistry-II: Physical Chemistry
Semester: 2
[Total Time: 2 ½ hrs.]
[Total Marks: 75]
Please check whether you have got the right question paper.
N.B.: 1) Attempt all questions
2) All questions carry equal marks.
3) Draw neat labeled diagrams wherever necessary.
4) Use of log tables and non-programmable calculators is allowed.
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Q. 1) Do as directed: (Any Fifteen) (15M)
1) State the second law of thermodynamics.
2) What is absolute zero temperature?
3) What is the SI unite of measuring enthalpy?
4) the amount of heat required to raise the temperature of 1 kg of water through 1°C is called _______________.
5) State true or false:- Temperature, pressure, and concentrations of reactants after rate of the reaction.
6) State true or false:- ORder of the reaction does not depend on the concentration of reactants.
7) Give one example of a second-order reaction.
8) Balance the following reaction:
I2 + HNO3→ HIO3 + NO2 + H2O
Complete the following reactions>
9) Br2 + H2D →
10) CuO + H2 →
11) MG + Cl2 →
Define the following.
12) Molecularity of a reaction
13) Chemical Kinetics
14) Deelectronation
15) Redox Reactions
16) Ion electron method
Name the following
17) A change is a system, in which the temperature remains constant: ΔT = 0
18) A chemical reaction in which the reactants and products are in the same phase.
19) An element or compound that loses (or “donates”) an electron to another chemical species in a redox reaction.
20) A transient species within a multi-step reaction mechanism that is produced in the preceding step and consumed in a subsequent step to ultimately generate the final reaction product.
Q. 2) a) What is the first law of thermodynamics? Discuss its limitations. (8M)
b) Discuss the expression of an ideal gas in the changes in its thermodynamic equilibrium. (7M)
OR
c) What are state functions? what are they dependent on? Discuss with examples. (8M)
d) Explain an open system. Discuss with examples biochemical system. (7M)
Q. 3 a) Derive halftime equation for a second-order reaction and comment on their relationship. (8M)
b) Define rate constant of reaction and explain its characteristics. (7M)
OR
c) Explain first-order reaction with one example. (8M)
d) A second-order reaction is started with 0.05 mol dm-1 concentration of both the reactions. if the reaction is 40% complete in 10 minutes then calculated the time taken for completion of 80% reaction. (7M)
Q. 4) a) What is the role of a reducing agent in a chemical reaction? Explain using suitable reactions. (8M)
b) Comment the statement – oxidation and reduction reaction always proceeds side by side. (7M)
OR
c) Compute the oxidation number of C in CH2O2 NI in NI(CO)4 and Pt in [Pt (C2H4)Cl3] (8M)
d) Show that the formation of sodium chloride from gaseous sodium and gaseous chloride is a redox reaction. (7M)
Q. 5) Write a short not on: (Any Three) (15M)
a) Entropy changes in an isobaric process.
b) Specific reaction Rate
c) Order of Reaction
d) Determination of oxidation state using permanganate ions
e) Odidizing agents with examples.
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