JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I PHARMACEUTICAL CHEMISTRY Previous Question Paper (January/February - 2024 - R22)
Part-A is a compulsory question. Part-B consists of ten questions, answer one from each unit.
PART - A
Explain Octet rule.
Answer
The Octet rule states that atoms tend to gain, lose, or share electrons to achieve a stable electron configuration with eight electrons in their outermost valence shell, resembling the electronic configuration of a noble gas.
What is mesomeric effect?
Answer
The Mesomeric effect (or resonance effect) is the permanent polarity produced in a conjugated system due to the complete transfer of pi-electrons or lone pair electrons from one atom to another, denoted as +M or -M effects.
What are enantiomers? Explain with an example.
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Draw the conformational structures of 1, 2-Dichloro ethane.
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Explain Huckels rule and aromaticity.
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Discuss the reactivity of free radicals.
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Explain the reactivity of E1.
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Discuss any two electrophillic addition reactions of alkenes.
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What is pharmacopoeia? Write the history of Indian pharmacopoeia.
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Write the principle involved in limit test for Lead.
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PART - B
Explain briefly on Bond Lengths
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Explain briefly on Bond Dissociation energies.
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Discuss the concept of Resonance.
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What is inductive effect?
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Explain the concept of chirality and symmetry.
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Discuss racemic modification and their resolution.
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What are Geometrical isomerism?
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Explain R and S nomenclature.
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Discuss the reactivity of non-benzenoid aromatic compound.
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Write the stability and reactivity of carbocation.
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Explain the reactivity and stability of carbenes.
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Write the structure, nomenclature and reactivity of naphthalene.
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Explain markonikov’s addition reaction.
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Discuss the reactivity and orientation of SN2 reaction.
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Explain E2 reaction with mechanism.
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Explain the factors influence on E1 and E2 reaction.
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What are the sources of impurities?
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Write the procedure involved in limit test for Iron.
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Explain the effect of impurities on API and Formulation.
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Write the principle involved in the limit test for Arsenic.
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