B.Sc. Chemistry-Honours 2nd Paper

B.Sc. Chemistry-Honours 2nd Paper

Second Paper -2021

1. a. Explain different types of Solid with appropriate example.
b. What is the relationship between coordination number and radius ratio ? Explain.
2. Write notes on any three of the following:
a. Exergonic and Endergonic reactions
b. Enthalpy of neutralization
c. Internal energy
d. Enthalpy
3. Explain the following:
a. Black-body radiation
b. Heisenberg's uncertainty principle
c. Quantisation of angular momentum is a direct consequence of de-Broglie's Equation.
4. a. Derive an equation for workdone in a reversible and isothermal expansion of an ideal gas. Show that work obtained is maximum.
b. Prove Cp - Cv = R
5. Give a method of preparation and application of the following:
a. Dimethyl zinc
b. Alkyl lithium
6. How will you identify the following elements in organic compounds:
i. Nitrogen
ii. Sulphur
b. How will you determine the molecular mass of an organic base by chloroplatinate method.
7. a. How glycerol is obtained from spent lye.
b. Give preparation and important properties of ethylene glycol.
8. a. Mention preparation and important properties of Primary amine.
b. How will you obtain the following compounds from acetic acid.
i. Acetamide
ii. Ethyl acetate
iii. Ethyl alcohol
9. Write short notes on any two of the following:
a. Preparation and stability of Free Radicals
b. Resonance
c. Free radical substitution reaction.

Second Paper -2020

Due to COVID, Exam was held in MCQ mode MCQ with Answer

Second Paper -2019

1. a. Define space lattice and unit cell for a crystal system.
b. Explain Face centred and body centred cubic crystal with suitable example.
c. Calculate limiting radius ratio for co-ordination number four.
2. a. State and explain first law of thermodynamics. Give its mathematical formulation.
b. What is Joule Thomson effect.
c. Why Joule Thomson coefficient for ideal gas is zero.
3. a. Draw the curve showing energy density versus wave length of a black body radiation.
b. State and explain Plauck's quantum theory.
c. Calculate the energy of one quanta of an electromagnetic radiation of wave length 2000 Å.
4. Write notes on any three of the following:
a. Enthalpy of combustion
b. Bond dissociation energy
c. Hess's Law
d. Quantisation of angular momentum
e. Inversion temperature Group-B
5. a. Discuss the different types of hybridization used in organic molecules with reference to bonding in C2H2 and C6H6.
b. Why acetylene is more acidic than ethylene ?
c. How will you determine molecular mass of a carboxylic acid by silver salt method.
6. a. How will you synthesis glycerol from propene ?
b. How glycerol reacts with the followings:
i. a mixture of acetic acid and acitic anhydride
ii. Hydrogen Iodide
iii. PCl3
iv. P2O5
7. a. Write down all possible isomeres of CH3CH2CH2CH2NH2.
b. How a Primary, Secondary and Tertiary animes reacts with Nitrous acid
c. Give formula of Lithium dialkyl cuprate. What is its use.
8. Arrange the following
a. In increasig order of stability: CH3CH2CH2+, CH3CH+CH3, (CH3)3C+
b. In increasing order of acidic strength:
c. In increasing order of basic strength:
d. In increasing order of stability 1,3-pentadiene, 1,4-pentadiene,Benzene
9. a. Explain Nucleophoile, Electrophile and Free Radical
b. What do you mean by SN1 and SN2 reaction
c. Give an example of electrophylic substitution reaction.

Second Paper -2018

1. a. Discuss
i. De Broglie hypothesis
ii. Heisenberg uncertainty principle
b. Calculate the wave length associated with an electron (m = 9.11 x 10-28 g) travelling with a velocity of 50% of the velocity of light.
2. Explain
i. Exothermic and Endothermic reaction
ii. Internal Energy and Enthalpy
b. Prove that Cp - Cv = R for an ideal gas 3. a. What do you mean by
i. Bravias Lattices
ii. Miller Indices
b. Discuss the crystal structure of CsCl
4. a. Find out an expression for the work done in isothermal reversible expansion.
b. What do you mean by limiting radius ratio. Calculate it for coordination number six.