12th class Chemistry Previous paper 2017 Jkbose Jammu Pdf download
ChemistrySet B
1) State and explain faraday’s laws of Electolysis.
Or
2) What are electrochemical cells? Describe brie¢y fuel cell.
3) How is Nitric acid prepared from Ostwald’s process? Give its reaction with Zinc and Iron.
Or
4) What are interhalogen compounds? Why are these named so? Give structure of CIF3 and CIF5.
5) Describe brie¢y the oxidation state of 3d-transition series elements along with the paramagnetic behaviour of
the ions/metals of this series.
Or
6) KMnO4 acts as a strong oxidizing agent in acidic, basic and neutral medium. Give two examples in each case.
7) How can aromatic aldehydes and ketones be prepared by the following reactions?
Reimer-Tiemann reaction
Fridel-Crafts reaction
Or
8) What are carboxylic acids? Describe the general methods of preparation of carboxylic acids.
Short Answer Type Questions
Explain with suitable examples the Dielctric properties of solids.
What is Arrhenius equation? Discuss its importance.
40 gm of NaOH are prepared in one deciliter of solution. Calculate mole fraction of NaOH.
What are phenols? How do they differ structurally from aromatic alcohols?
Describe the main postulates of Vernier’s theory of Co-ordination compounds.
Explain the following:
(i) Denaturation of Proteins
(ii) Peptide bond
Name the oxy-acids of Phosphorous. Write their structures.
Give the reaction of Ethyl amine with:
(i) Grignard’s reagent.
(ii) Carbon disulphoide
Very Short Answer Type Questions
1. What are Antihistamines? Give examples.
2. How is Bakelite synthesized?
3. Why is the time saved when cooking is clone in a pressure cooker?
4. Distinguish between Physical and Chemical absorption.
5. Explain Leaching of Bauxite.
6. Will elevation in boiling point be same for 0.1 M NaCI and 0.1 M Sucrose Solution?
7. Brie¢y explain the term Electrophoresis.
8. What are Haloalkanes? How can haloalkanes be prepared from Alcohols?
Objective Type Questions
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