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The first ionization enthalpy of oxygen ...

The first ionization enthalpy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this observation?

A

Less effective nuclear charge of oxygen than nitrogen

B

Lesser atomic size of oxygen than nitrogen.

C

Greater inter electron repulsion between two electrons in the same p-orbital counter balances the increase in effective nuclear charge on moving from nitrogen to oxygen.

D

Greater effective nuclear charge of oxygen than nitrogen.

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Teh first ionization energy of oxygen is less than the of nitrogen. Which of the following is the correct reason for this observation?

    A
    Lesser effective nuclear charge of oxygen the nitrogen
    B
    Lesser atomic size of oxygen than nitrogen
    C
    Greater inter-electron repulsion between two electrons in the p-orbital counter balance the increase in effective nuclear charge on moving from nitrogen to oxygen
    D
    Greater effective nuclear charge of oxygen teh nitrogen.

  • The ionisation enthalpy of nitrogen is larger than that of oxygen because of:

    A
    Larger size of N -atom
    B
    Greater attraction of electrons by the nucleus
    C
    Stability of half filled p- subshell configuration of N-atom
    D
    Greater penetration effect.

  • The first ionisation enthalpy of Mg is higher than the first ionisation enthalpy of:

    A
    Be
    B
    Al
    C
    K
    D
    Rb

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