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12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I Question Bank Software Jun-21 , 2021

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12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 30
    10 x 3 = 30

  1. Before reduction, the ore is first converted into the oxide of metal of interest. Give reason

  2. How is aluminum chloride prepared from aluminum?

  3. Why do noble gases form compounds with fluorine and oxygen only?

  4. What are the general properties of f-block elements? (Lanthanides and Actinides)
    (i) Electronic configuration
    (ii) Oxidation state
    (iii) Radii of tripositive ions.

  5. Aqueous copper sulphate solution (blue) gives
    (i) a green precipitate with aqueous potassium fluoride.
    (ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.

  6. If NaCI is doped with 10-3 mol % of SrCl2 What is the concentration of cation valencies?

  7. A reaction is of second order in A and first order in B.
    (i) Write the differential rate equation. 
    (ii) How is the rate affected on increasing the concentration of A three times?
    (iii) How is the rate affected when the concentration of both A and B is doubled?

  8. Define buffer Index

  9. Define equivalent conductance.

  10. What are the advantages of Brownian movement?

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