B.Sc.-Basic Chemistry-II-Mumbai-April 2017
MUMBAI UNIVERSITY
Subject: Basic Chemistry-II
Semester: 1
[Total Time: 2 ½ hours.
[Total Marks: 75 ]
N.B. 1 All questions are compulsory.
2 All questions carry equal marks.
3 Figures to the fight indicate marks.
4 Draw a neat labeled diagram wherever necessary.
5 Use of log table and non-programmable calculator is allowed.
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Q.1) Do as directed (any 15) (15M)
Fill in the Blanks:
1) 1-Buten and 2-Buten are _____________ isomers of each other.
2) Cuvette in colorimeter is made up of ___________ material.
3 Which of the following compounds shows optical isomerism.
a) CH3-CHBr-CH3 b) CH3-CH(CH3)-CH2-CH3
c) CH3– CHOC-COOH
3) Draw the cis and trans isomers of 3, 4 dimethyl-3-heptene.
5) Draw contiomers for CH3-CHBr-CH2OH
6) Is (R) – Lactic acid levorotatory or dextrorotatory?
7) What is a stereocenter?
8) In normal phase chromatography, the mobile phase is more polar than the stationary phase- True/False.
Define the following.
9) Enantiomers
10) Common ion effect
11) Diverse ion effect
12) Precipitation
13) Nucleation
14) Endpoint of titration
15) Mobile Phase
16) Distillation
17) Absorption spectrum.
Give one example of the following.
18) Indicator used for complexometric titration.
19) Primary standard acid.
20) Give the formula for calculating Rf value.
Q. 2) a) Explain stereoisomerism with examples. (8M)
b) Elaborate on meso compounds with examples. (7M)
OR
c) Enlist different types of isomerism giving one example each. (8M)
d) Explain the types of projection formulae and their interconversions. (7M)
Q. 3) a) Discuss the different types of titrations with example. (8M)
b) Explain the role of indicators in acid-base titrations. (7M)
OR
c) Discuss aging and digestion of the precipitate with respect to gravimetric analysis. (8M)
d) Explain primary and secondary standards in titrimetric analysis. (7M)
Q. 4) a) State Beer-Lambert’s law and enlist its limitations. (8M)
b) Explain the principle and applications of paper chromatography. (7M)
OR
c) Discuss any two methods of separation. (8M)
d) Explain the principle of column chromatography. (7M)
Q. 5) Write a short note on ( any three ) (15M)
a) Diasteromerism.
b) Conformations of ethane in Newman and Sawhorse projection.
c) Co-precipitations and Post-Precipitation.
d) Applications of Thin Layer Chromatography.
e) Extinction coefficient.
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