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Assertion: The first ionization energy o...

Assertion: The first ionization energy of Be is greater than that of B.
Reason: 2p-orbital is lower in energy than 2s-orbital.

A

Statement-1 is Ture, Statement 2 is True, Statemnet -2 is correct explanation for Statement -1

B

Statement -1 is Ture, 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

Text Solution

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The correct Answer is:
C
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In each of the following questions a Statement of Assertion (A ) is given followed by a corresponding statement of Reason (R ) Just below it . Of the statement mark the correct answer as Assertion . The first ionization energy of Be is greater than that of B. Reason . 2p- Orbitals is lower in energy than 2s- orbital.

The first ionization enthalpy of O is lower than that of N.

Knowledge Check

  • Assertion: The first ionization energy of Be is greater than that of B. Reason: 2p-orbital is lowerr in energy than 2s-orbital.

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

  • Assertion: The first ionisation energy of Be is greater than that of B . Reason: 2p-orbital is lower in energy than 2s-orbital.

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

  • Assertion :- The first ionization energy of Be is greater than that of B 2p- orbital is lower in energy when 2s- orbital.

    A
    If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
    B
    If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
    C
    If Assertion is True, but the Reason is False.
    D
    If both Assertion & Reason are false

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