How was the CBSE Chemistry exam 2016?
It was reported by various agencies that this year’s (2016) exam was the toughest compared to last 5 years question paper. Is it true? Was the question paper really a hard nut?
How much do you expect in CBSE Chemistry theory paper?
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Electrochemistry – Long Answer Type Questions
- What is galvanic cell?Explain the working of a galvanic cell by taking the example of Zn/CuSO4 reaction.Explain in brief the function of the salt bridge?
- What is electrode potential?describe the orgin of electrode potential when a metal strip is placed in a solution of its own ions.In what respects electrode potential differs from standard electrode potential?
- What do you understand by battery?Describe the chemistry of lead storage battery during its discharging and recharging process highlighting all the materials that are involved?
- What is corrosion of metals?How is rusting of iron envisaged as setting of electrochemical cell?Explain.Can a coating of tin over iron surface prevent rusting?Comment.
- What is meant by electrolytic conduction?On what factors does it depend?How does it differ from metallic conduction?
- Derive the relationship between (1) Conductivity and molar conductivity and (2)Standard cell potential and equilibrium constant?
- How does emf of a cell vary with temperature?Explain in brief?
- State and explain Kohlrausch law?How can it help to calculate (1) limiting molar conductivity of weak electrolyte and (2)degree of dissociation of weak electrolyte.
- How do you account for the variation of molar conductivity of weak and strong electrolytes with concentration?
- Iron does not rust when a coating of zinc cover its surface cracks in galvanised iron pipes , but it rusts rapidly when a coating of tin done on its surface cracks.Explain.
- What is electrolysis?What role does electrode potential play while deciding the products of electrolysis?
- Write short note on (1)Hydrogen economy (2)Faradays-laws of electrolysis
AISSCE (CBSE Class XII) Chemistry through selected Long Answer Type Questions –
Unit 2 – Solutions
- What do you understand by vapour pressure of a liquid? How does it vary with temperature? Using pressure temperature curve show that what is normal boiling point and standard boiling point of a liquid?
- What is Vant Hoff’s factor? How is it related to degree of dissociation of the electrolyte in the solution? What is its value when the solute undergoes association?
Chapterwise long answer type questions for AISSCE (CBSE Class XII) Chemistry
Unit 1 – The Solid State
- Describe the following
- Hexagonal close packing
- Cubic close packing
- Body centred cubic packing
- What are the seven types of crystal systems? Give their unit cell dimensions. Draw structures of different types of unit cells which are possible for cubic crystal system.
- What do you mean by stoichiometric point defects? Describe briefly the various types of stoichiometric point defects.
- Explain the following.
- Schottky defect
- Frenkel defect
- F – centres
- Explain the conduction behaviour of metals, semiconductors and insulators on the basis of band theory of solids. What is the effect of increase of temperature on electrical conductivity of metals, semiconductors and insulators.
- Explain the following with suitable examples
- Paramagnetic substances
- ferrimagnetic substances
- Ferromagnetic substances