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11th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - I

11th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 36

    Part I

    12 x 3 = 36
  1. What is the difference between molecular mass and molar mass ? Calculate the molecular mass and molar mass for carbon monoxide.

  2. Describe the Aufbau principle

  3. Justify that the fifth period of the periodic table should have 18 elements on the basis of quantum numbers.

  4. What is water-gas shift reaction?

  5. Give the systematic names for the following
    Milk of magnesia

  6. Give suitable explanation for the following facts about gases.
    Gases don't settle at the bottom of a container.

  7. State the various statements of second law of thermodynamics.

  8. The equilibrium concentrations of NH3, N2 and H2 are 1.8 x 10-2 M, 1.2 x 10-2 M and 3 x 10-2 M respectively. Calculate the equilibrium constant for the formation of NH3 from N2 and H2. [Hint: M= mol lit-1]

  9. Vapour pressure of a pure liquid A is 10.0 torr at 27°C. The vapour pressure is lowered to 9.0 torr on dissolving one gram of B in 20 g of A. If the molar mass of A is 200 then calculate the molar mass of B.

  10. 0.40 g of an iodo-substituted organic compound gave 0.235 g of AgI by carius method. Calculate the percentage of iodine in the compound. (Ag = 108, I = 127)

  11. Two isomers (A) and (B) have the same molecular formula C2H4Cl2. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C2H4O. Compound (B) reacts with aqueous KOH gives compound(D) of molecular formula C2H6O2. Identify (A), (B), (C) and (D).

  12. Explain how oxygen deficiency is caused by carbon monoxide in our blood ? Give its effect

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