Download OU Intermediate 2018 Core Subjects 0223 Chemistry Question Paper

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Total No. of Questions - 21

Total No. of Printed Pages - 2

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CHEMISTRY, Paper - II (English Version) Max. Marks : 60

Time : 3 hours

Note : Read the following instructions carefully.

1. Answer all questions of Section 'A’. Answer any six questions in Section 'B' and any two questions in Section 'C".
2. In Section 'A’, questions from Sr. Nos. 1 to 10 are of "Very Short Answer Type". Each question carries two marks. Every answer may be limited to 2 or 3 sentences. Answer all these questions at one place in the same order.

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3. In Section 'B', questions from Sr. Nos. 11 to 18 are of "Short Answer Type". Each question carries four marks. Every answer may be limited to 75 words.
4. In Section 'C', questions from Sr. Nos. 19 to 21 are of "Long Answer Type". Each question carries eight marks. Every answer may be limited to 300 words.
5. Draw labelled diagrams wherever necessary for questions in Sections ‘B' and 'C".

SECTION A 10 X 2 =20

Note : Answer all questions.

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1. State Raoult’s law.
2. State Faraday’s second law of electrolysis.
3. What is PHBV? How is it useful to man?
4. Write the names of the monomers for the following polymers. a) Bakelite b) Nylon 6,6
5. What is a ligand? Give one example for unidentate ligand.

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6. What are the neutral oxides of nitrogen?
7. What happens when Cl₂ reacts with dry slaked lime?
8. What is blister copper? Why is it so called?
9. Explain carbylamine reaction with an example.
10. Explain the reaction of Aniline with Nitrous acid.

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SECTION B 6X4=24

Note : Answer any six questions.

1. Explain Schottky and Frenkel defects.
2. Define mole fraction. Calculate the mole fraction of H₂SO₄ in a solution containing 98% (w/w) H₂SO₄ by mass.

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3. What are emulsions? How are they classified? Give one example for each.
4. Explain calcination and roasting with suitable examples.
5. Explain Werner’s theory of coordination compounds with examples.
6. What are hormones? Give one example for each of the following : a) Steroid hormones b) Polypeptide hormones c) Amino acid derivatives
7. What are analgesics? How are they classified? Give one example for each.

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8. Explain S_N1 and S_N2 reactions with an example.

SECTION C 2 X 8 =16

Note : Answer any two questions.

1. a) What are Galvanic cells? Explain the working of a Galvanic cell by taking Daniel cell as example. b) Describe the salient features of the collision theory of reaction rates.
2. a) Write the important reactions involved in the manufacture of sulphuric acid by ‘contact process’. b) Write the preparation of compounds XeF₂ and XeF₄. Give their structures.

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3. Explain the following reactions with equations. a) Kolbe's reaction b) Reimer - Tiemann reaction c) Williamson ether synthesis

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