JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I Year CHEMISTRY Previous Question Paper (May - 2019 - R18)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART- A
(25 Marks)
Describe molecular orbital energy level diagram of F2.
Answer
The molecular orbital energy level diagram for F2 involves the filling of orbitals in the order: σ1s < σ*1s < σ2s < σ*2s < σ2pz < π2px = π2py < π*2px = π*2py < σ*2pz. For F2 (18 electrons), all bonding and antibonding orbitals up to π*2p are filled, resulting in a bond order of 1 and diamagnetic behavior.
Explain specifications in portable water.
Answer
Portable water must be free from pathogenic microorganisms, clear in appearance, odorless, and colorless. It should have a pH between 6.5 and 8.5, total dissolved solids below 500 mg/L, and concentrations of toxic ions like lead, arsenic, and fluoride within permissible limits defined by regulatory standards (e.g., WHO or BIS).
Define standard electrode potential.
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Explain the term chirality.
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Define chemical shift.
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Discuss band structure of solids.
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Describe colloidal conditioning.
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Write a note on cathodic protection.
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Write the structure and pharmacological applications of Aspirin.
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Describe the principle of vibrational and rotational spectroscopy.
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PART- B
(50 Marks)
Describe the hybridization of π molecular orbitals in benzene.
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Discuss salient features of crystal field theory.
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Write crystal field splitting of d-orbitals in octahedral geometry.
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Write molecular orbital energy level diagram of O2.
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Write a note on effect of doping on conduction.
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Discuss crystal field splitting of d-orbitals in tetrahedral geometry.
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Discuss disinfection of water by ozonisation.
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What are different factors causing hardness to water?
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Write a note on ion exchange process.
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Write a note of reverse osmosis.
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Explain disinfection of water by chlorination.
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Describe Calgon conditioning.
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Describe the construction and working of quinhydrone electrode.
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Discuss galvanic corrosion.
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Write a note on surface coatings.
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Describe different types of corrosion.
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Discuss electrolytic plating of nickel.
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Write Nernst equation.
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Write conformational structures of n-butane.
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Explain saytzef rule.
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Write a note on hydroboration of olefins.
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Write the mechanism of SN1 reaction.
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Discuss the mechanism of reduction of carbonyl compounds with NaBH4.
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Write the product when HBr is added to propene under thermal conditions.
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Discuss the applications of electronic spectroscopy.
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Write the principle of NMR spectroscopy.
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Discuss magnetic resonance imaging.
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Write the energy diagram of carbonyl compounds in electronic spectroscopy.
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