Solution MCQ Class-12

11. Humidity is the example of ____
    • Gas in gas
    • Solid in gas
    • Liquid in gas
    • Gas in liquid

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12. What is the effect of pressure on solubility of solid
    • Solubility increases
    • Solubility decreases
    • Does not change
    • None

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13. Which is the cause of  bend condition
    • Low solubility of oxygen in blood
    • High solubility of nitrogen
    • Air bubbles due to nitrogen gasLow solubility of helium

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14. Which gas is added to oxygen cylinder of scuba diver to avoid from bend
    • Dinitrogen
    • Dioxygen
    • Helium
    • Hydrogen

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15. Mountaineers carries oxygen cylinder to avoid –
    • Bend condition
    • Tindal effect
    • Decrease VP
    • Anoxia condition

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16. Low solubility of oxygen in blood on mountain is due to
    • High pressure of N2
    • High pressure of O2
    • Low partial pressure of O2
    • High partial pressure of O2

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17. Solubility of gas is directly proportion to
    • Temperature
    • Pressure
    • Nature of gas
    • All

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18. Acc to Raoult’s law, for volatile solute, VP is directly proportional to
    • Mole fraction of volatile component
    • Pressure of gas
    • Solubility of gas
    • Mole fraction of non-volatile component

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19. Condition for ideal solution is –
    • Obey Raoult’s law
    • A –B interaction = A-A & B-B
    • Enthalpy change = 0
    • All

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20. Write enthalpy and volume changes for non-ideal solution
    • Positive
    • Negative
    • Unchanged
    • None

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