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Which of the following statement is true...

Which of the following statement is true-

A

entropy increases when water vaporises

B

randomness decreases in the fusion of ice

C

randomness increases in the condensation of water vapour

D

randomness remains unchanged during vaporisation of water

Text Solution

Verified by Experts

The correct Answer is:
A
Vaporisation of water (water `to` water vapour) involves increase in entropy of the system because the molecular randomness in water vapour is greater than that in water.
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Knowledge Check

  • Which of the following statements is true?

    A
    The total entropy of the universe is continuously decreasing.
    B
    The total energy of the universe is continuously decreasing.
    C
    The total energy of the universe rémains constant.
    D
    The total entropy of the universe remains constant.

  • Which of the following statements is true-

    A
    in hexagonal close-packed arrangement of spheres, the spheres of the first and fourth layers have the same vertical alignment
    B
    in cubic close-packed arrangement of spheres, the sphere of the first and third laters have the same vertical alignment
    C
    in cubic close-packed structure, the fifth layer repeats the second layer
    D
    hexagonal arrangement in three dimensions is less closely-packed than the cubic arrangement

  • An element X belongs to fourth period and fifteenth group of the periodic table. Which of the following statements is true-

    A
    it has a completely filled s-orbital and a partially filled d-orbital
    B
    It has completely filled s-and p-orbital and a partly filled d-orbital
    C
    it has completely filled s-and p-orbitals and a half filled d-orbital.
    D
    it has a half-filled p-orbital and completely filled s-and d-orbital
    • CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-ENTRANCE QUESTION BANK
    1. Which of the following statement is true-

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    2. Identify the correct statement in a chemical reaction-

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    3. The condition for spontaneity of a process is-

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    4. P*V Work done by an ideal gaseous system at constant volume is (E is i...

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    5. Mixing of two different ideal gases under isothermal reversible condit...

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    6. For an isothermal expansion of an ideal gas, the correct combination o...

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    7. The change in entropy (dS) is defined as-

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    8. DeltaH for cooling 2 mol ideal monoatomic gas from 225^(@)C to 125^(@)...

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    9. For a spontaneous process, correct statement (s) is (are)-

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    10. Given: C+O(2)toCO(2),DeltaH^(0)=-xkJ 2CO+O(2)to2CO(2),DeltaH^(0)-y k...

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    11. The enthalpy of vaporisation of a certain liquid at its boiling point ...

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    12. DeltaH and DeltaS of a certain reaction are -400 kJ*mol^(-1) and -20kJ...

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    13. For the reaction X(2)Y(4)(l) to 2XY(g) at 300K the values of DeltaU an...

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    14. For the reaction 2SO(2)(g)+O(2)(g)hArr2SO(3)(g) at 300K, value of Delt...

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    15. The condition for a reaction to occur spontaneously is -

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    16. During a reversible adiabatic process, the pressure of a gas is found ...

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    17. The heat of neutralisation of a strong base and a strong acid is 13.7 ...

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    18. The entropy change involved in the isothermal reversible expansion of ...

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    19. Among the following expressions which one is incorrect-

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    20. A cylinder filled with 0.04 mol of ideal gas expands reversible from 5...

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