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Assertion (A): The endothermic reactions...

Assertion (A): The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature.
Reason (R ) : when a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of the change.

A

both (A) and (R ) are correct, and (R ) is the correct explanation for (A).

B

both (A) and (R ) are correct, but(R ) is not a correct explanation for (A).

C

(A) is correct, but (R ) is incorrect.

D

(A) is incorrect, but (R ) is correct.

Text Solution

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Endothermic reaction requires heat energy to produced in forward direction.
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Exothermic reactions are favoured by ____ in temperature

Assertion (A): May endothermic reactions that are not spontaneous at room temperature become spontaneous at high temperature. Reason (R ) : Entropy of the system increases with increase in temperature.

Knowledge Check

  • Statement-1 : The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature. Statement-2 : when a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of change.

    A
    If both the statements are true and statement -2 is the correct explanation of statement-I
    B
    If both the statements are true but statement-2 is not the correct explanation of statement-I
    C
    If statement-I is true and statement-2 is false
    D
    If statement-I is false and statement-2 is true.

  • Statement 1 : The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature. Statement 2 : When a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of change.

    A
    Statement 1 is true, statement-2 is true, statement 2 is a correct explanation for statement 1
    B
    Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 1
    C
    Statement 1 is true, statement 2 is false
    D
    Statement 1 is false, statement 2 is true

  • Statement -1: The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperatuer. and Statement -2: When a system in equilibrium is distributed by changing the temperature it will tend to adjust itself so as to overcome the effect of change.

    A
    Statement -1 is true, Statement -2 is true, Statement -2 is correct explanation for statement -2
    B
    Statement -1 is true, Statement -2 is true, Statement -2 is not a correct explanation for statement -2
    C
    Statement -1 is true, statement -2 is false
    D
    Statement -1 is false, statement -2 is true.
    • CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Assertion-Reasoning)
    1. Assertion (A): The endothermic reactions are favoured at lower tempera...

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    2. Assertion: C(P)-C(V)=R for an ideal gas. Reason: ((delE)/(delV))(T)=...

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    4. Assertion (A): The thermodynamic factor which determines the spontane...

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    5. Assertion (A): The Joules -Thomon coefficient for an ideal gas is zer...

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    6. Assertion (A): Enthalpy of graphite is lower than that of diamond. R...

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    7. Assertion: The enthalpy of formation of gaseous oxygen molecules at 29...

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    8. Assertion (A): Heat of neutralisation for both HNO(3) and HCI with NaO...

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    9. Assertion (A): Decrease in free energy causes spontaneous reaction ...

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    10. Assertion (A): May endothermic reactions that are not spontaneous at ...

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    11. Assertion (A): The enthalpy of formation of H(2)O(l) is greater than t...

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    12. Assertion (A): For a particular reaction, heat of combustion at consta...

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    13. Assertion (A): The enthalpy of both graphite and diamond is taken to ...

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    14. Assertion (A): The heat of neutralisation of perchloric acid, HCIO(4),...

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    15. Assertion (A): The Heat of ionisation of water is equal to the heat o...

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    16. Assertion (A): The enthalpy of formation of HCI is equal to the bond e...

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    17. Assertion (A): Pressure, volume, and temperature are all extensive pro...

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    18. Assertion (A): When a gas at high pressure expands against vacuum, th...

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    19. Assertion: When a real gas is allowed to expand adiabatically through ...

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