Mody Institute of Technology and Science 2011 B.Tech Computer Science and Engineering End Term , (CS) Chemistry || (CY 106) - Question Paper

Course Name: Chemistry || Time: three hr
Course Code: CY106 Max. Marks:100




Attempt ques. number one and any 5 from the rest.



Q1.
(1) A reaction is obtained to be zero order reaction, will its molecularity be also zero?
(2) What would be the units of 1st order rate constant if the concentration is expressed in moles/litre and time in seconds?
(3) What is the significance of suffix-66 in nylon-66?
(4) provide an example of monomer undergoing cationic polymerization?
(5) Write the total no. of hexagonal and pentagonal faces in C60 fullerene?
(6) What do you understand by critical temperature of a superconductor?
(7) Write any 2 important functions of lubricants?
(8) provide 1 example every of a solid and semi solid lubricant.
(9) How many kinds of electronic transitions occur in UV spectroscopy?
(10) What do you undestand by Chemical shift in NMR spectroscopy? [MARKS 2*10=20]


Q2.
(1) Derive the integrated rate formula for the 2nd order reaction with 2 various reactants.
(2) Thermal decomposition of a compound is of half order. If 50% of a sample of the compound is decomposed in 120 minutes,
how long will it take for 90% of the compound to decompose?
(3) Write the mechanism of Wilkinson's catalyst. [MARKS 8+3+5=16]


Q3.
(1) elaborate the various steps of free radical polymerization? Why the polymers formed by cationic polymerization are called as residing polymers?
(2) Write a short note on vulcanization of rubber.
(3) Depict the basic structural unit and uses of(a) Polyamides and (b) Polyester [MARKS 7+5+4=16]


Q4.
(1) What is the differnce ranging from order and molecularity of a reaction?
(2) discuss Atactic, Isotactic, and Syndiotactic polymers.
(3) Derive the kinetic expression for unimolecular surface reactions,
(4) Write down the various kinds of silicone polymers and its apllications. [MARKS 3+3+5+5=16]


Q5.
(1) Write any 2 differences ranging from semiconductors and organic conducting materials.
(2) What is superconductivity? elaborate the parameters upon which superconductivity depends? Mention a few important applications of superconductors.
(3) elaborate the various ways of making an insulating polymer electronically conducting? [MARKS 2+8+6=16]


Q6.
(1)What do you understand by lubrication? describe any 2 mechanisms of lubrication?
(2) discuss the subsequent properties of lubricants and provide their significance:
(a) cloud and pour point
(b) viscosity and viscosity index
(c) flash and fire point [Marks 7+9=16]


Q7.
(1) State Lambert-beer's legal regulations. What is its significance in spectroscopy?
(2) discuss the subsequent terms:
(a) Modes of vibration in IR spectroscopy.
(b) Hypsochromic and Bathochromic shift.
(c) How to distinguish ranging from ethyl alcohol and ether in IR spectroscopy. [MARKS 4+12=16]


Q8.
Write short notes on any 4 of the following:
(a) Sulphur polymer
(b) Cyclic voltmetry
(c) Emulsification
(4) Nano materials
(e) Fullerenes
(f) Basic principle of NMR spectroscopy
(g) Half lives and its significance [MARKS 4*4=16]

Earning:   Approval pending.