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Assertion: The enthalpy of formation of ...

Assertion: The enthalpy of formation of geseous oxygen molecules at `298K` and under of 1 atm is zero.
Reason: The entropy of formation of gaseous oxygen molecules under the same condition is zero.

A

If both the assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both the assertion and reason are true but reason is not the correct explantion of the assertion.

C

If the assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
It is correct that on touching the ice we feel cold because ice absorb heat from our hand.
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Knowledge Check

  • Assertion : The enthalpy of formation of gaseous oxygen molecules at 298 K and under pressure of 1 atm is zero. Reason : The entropy of formation of gaseous oxygen molecules under the same condition is zero.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If the assertion and reason both are false.

  • Assertion. The enthalpy of formation of gaseous oxygen molecules at 298 K and under a pressure of one atmosphere is zero. Reason. The entropy of formation of geseous oxygen molecule under the same conditions is zero.

    A
    If both A and R are true,andR is the true explanation of A.
    B
    If both A and R are true,but R is not the true explanation of A.
    C
    If A is true, but R is false
    D
    If both A and R are false.

  • Statement -1 : The enthalpy of formation of gaseous oxygen molecule at 298 K and under a pressure of one atm is zero. Statement -2: The entropy of formation of gaseous oxygen molecules under the same condition is zero.

    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.

    • Similar Questions

    Explore conceptually related problems

    Assertion(A) : The enthalpy of formation of O_(2) at 1 atmospheric pressure and 298K is zero. Reason(R ) : The enthalpy of formation of all the elements at STP is zero.

    The enthalpy of formation of a compound is equal in magnitude but of opposite sign to the enthalpy of decomposition of that compound under the same conditions. This law was presented by

    "The enthalpy of formation of a compound is equal in magnitude but of opposite sign to the enthalpy of decomposition of that compound under the same conditions". This law was presented by:

    The enthalpy of formation of water from hydrogen and oxygen is _286 kJ mol^-1 The enthalpy of decomposition of water into hydrogen and oxygen is

    The most easily hydrolysed molecule under S_(N^(1)) condition is:

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