Download GTU BE/B.Tech 2017 Winter 3rd Sem Old 132805 Organic Chemistry Question Paper

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Seat No.: Enrolment No.

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-III (OLD) EXAMINATION - WINTER 2017

Subject Code:132805 Date:01/12/2017

Subject Name: Organic Chemistry

Time: 10:30 AM to 01:00 PM

Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain in short. [07]

1. Define Organic Reaction Mechanism?

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2. Define Atomic Orbital.
3. What is Quantum No?
4. Carbonium ions are positive by nature Why?
5. Define Polynuclear Hydrocarbon?
6. Ketone on oxidation gives?

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7. Principle of Chromatography?

(b) Define the following terms: [07]

1. Plane Polarized Light.
2. Bond Length.
3. Polarity.

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4. Test for Primary Amine.
5. Molecular Orbital.
6. Lewis Acid and Base.
7. Coordinate Bond.

Q.2 (a) Describe in detail different General methods of preparation, properties and uses of Aldehydes and Ketones. [07]

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(b) (1) Crystallization and Sublimation. [07]

(2) Hybridization.

OR

(b) (1) Vacuum distillation [07]

(2) Difference between Primary, Secondary and Tertiary Alcohols.

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Q.3 (a) What is the utility of Isomers. Explain Structural isomerism in detail. [07]

(b) Brief Carbonium, Carbanion and Free Radical. [07]

OR

Q.3 (a) Write in detail the preparation of Naphthalene and Anthracene. [07]

Q.4 (a) Write in general preparation, properties and uses of Carboxylic acids. [07]

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(b) Write preparation, properties and uses of Nitro compounds. [07]

OR

Q.4 (a) Explain Electrophillic Addition and Substitution reaction with mechanism. [07]

(b) Explain Cummene process and Sandmeyer reaction with mechanism. [07]

Q.5 (a) Write preparation, properties and uses of Thiophene and Pyridine. [07]

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(b) Explain Nucleophillic Substitution and Addition reaction with example. [07]

OR

Q.5 (a) Explain preparation, properties and uses of Aryl halides. [07]

(b) Explain Solubility. Show the importance of Protic and Aprotic solvents. [07]

(b) Brief different tests to identify Phthalic acid in laboratory. [07]

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