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11th Standard Chemistry English Medium Free Online Test Book Back One Mark Questions

11th Standard

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Chemistry

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. 40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left. after cooling to room temperature is

    (a)

    40 ml CO2 gas

    (b)

    40 ml CO2 gas and 80 ml H2O gas

    (c)

    60 ml CO2 gas and 60 ml H2O gas

    (d)

    120 ml CO2 gas

  2. The energy of light of wavelength 45 nm is

    (a)

    6.67 x 1015J

    (b)

    6.67 x 1011J

    (c)

    4.42 x 10-18J

    (d)

    4.42 x 10-15J

  3. What would be the IUPAC name for an element with atomic number 222?

    (a)

    bibibiium

    (b)

    bididium

    (c)

    didibium

    (d)

    bibibium

  4. Which of the following statements about hydrogen is incorrect?

    (a)

    Hydrogen ion, H3O+ exists freely in solution.

    (b)

    Dihydrogen acts as a reducing agent.

    (c)

    Hydrogen has three isotopes of which tritium is the most common.

    (d)

    Hydrogen never acts. as cation in ionic salts

  5. For alkali metals, which one of the following trends is incorrect?

    (a)

    Hydration energy: Li > Na > K > Rb

    (b)

    Ionisation energy: Li > Na > K > Rb

    (c)

    Density: Li < Na < K < Rb

    (d)

    Atomic size: Li < Na < K < Rb

  6. Gases deviate from ideal behavior at high pressure. Which of the following statement(s) is correct for non-ideality?

    (a)

    at high pressure the collision between the gas molecule become enormous

    (b)

    at high pressure the gas molecules move only in one direction

    (c)

    at high pressure, the volume of gas become insignificant

    (d)

    at high pressure the intermolecular interactions become significant

  7. The amount of heat exchanged with surrounding at constant temperature pressure is given by the quantity

    (a)

    ΔE

    (b)

    ΔH

    (c)

    ΔS

    (d)

    ΔG

  8. If Kb and Kf for a reversible reactions are 0.8 ×10–5 and 1.6 × 10–4 respectively, the value of the equilibrium constant is,

    (a)

    20

    (b)

    0.2 x 10-4

    (c)

    0.05

    (d)

    none of these

  9. The molality of a solution containing 1.8g of glucose dissolved in 250g of water is

    (a)

    0.2 M

    (b)

    0.01 M

    (c)

    0.02 M

    (d)

    0.04 M

  10. In which of the following Compounds does the central atom obey the octet rule?

    (a)

    XeF4

    (b)

    AlCl3

    (c)

    SF6

    (d)

    SCl2

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