JNTU
JNTU B.Pharmacy III GREEN CHEMISTRY Previous Question Paper (December-2019 - R17)
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 as sub questions.
PART A
Name the synthesis done by using catalysts with one example?
Answer
Catalytic synthesis involves the use of a substance (catalyst) that increases the rate of a chemical reaction without being consumed. An example is the Hydrogenation of vegetable oils using a Nickel catalyst to produce margarine.
Explain about the synthesis performed using microwaves.
Answer
Microwave-assisted synthesis utilizes electromagnetic radiation in the frequency range of 0.3 to 300 GHz to heat reaction mixtures. It provides rapid, uniform, and internal heating through dipole rotation and ionic conduction, significantly reducing reaction times, minimizing energy consumption, and often improving yields compared to conventional thermal heating.
What is Michael reaction?
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Explain the difference between aqueous reactions and solventless reactions.
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What is Reformatsky reaction?
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Explain about the reduction reactions using metal halides.
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What is Knovenegal condensation?
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Outline the alternative reagents that can be used in the green chemistry.
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Outline the schematic synthesis of Paracetamol.
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Explain the future trends of green chemistry.
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PART B
Explain the concept of Green chemistry with two examples.
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Give a brief note on solventless synthesis.
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Explain the synthetic applications of ultrasonic synthesis.
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Outline the principles of green chemistry.
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Explain the process involved in the Michael reaction.
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Explain the applications of synthesis done without using solvents.
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Explain the principle and the process involved in the Wartz synthesis.
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Explain briefly about alternative solvents in green chemistry.
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Explain the differences between Microwave and ultrasonic reactions.
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Explain about the principle and process involved in the Diels alder reaction.
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Explain about the principle and process involved in the Fries rearrangement and Strecker reactions.
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Explain in detail about solid supported reactions with examples.
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Explain about villeger reactions.
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Explain about the principle and process involved in the reactions catalysed by metals.
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Explain the principle and procedure involved in the greener synthesis of Aspirin.
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Explain the principle and procedure involved in the greener synthesis of Ibuprofen.
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