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12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - II

12th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 75

    Part I

    15 x 5 = 75
  1. The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  2. How will you convert boric acid to boron nitride?

  3. Give a reaction between nitric acid and a basic oxide.

  4. The E0M2+/M value for copper is positive. Suggest a possible reason for this.

  5. A solution of [Ni(H2O)6]2+ is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

  6. KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K+ and F in KF. (given : density of KF is 248 g cm-3)

  7. A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

  8. Ksp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO3

  9. In fuel cell Hand O2 react to produce electricity. In the process, H2 gas is oxidised at the anode and O2 at cathode. If 44.8 litre of H2 at 250C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu2+, how many grams of Cu deposited?

  10. Why does bleeding stop by rubbing moist alum

  11. How will you convert acetylene into n-butyl alcohol.

  12. How are the following conversions effected
    (a) propanal into butanone
    (b) Hex-3-yne into hexan-3-one.
    (c) phenylmethanal into benzoic acid
    (d) phenylmethanal into benzoin

  13. Identify A aniline + benzaldehyde → A

  14. Write the structure of all possible dipeptides which can be obtained form glycine and alanine

  15. What are bio degradable polymers? Give examples.

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