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Which of the following electrons configr...

Which of the following electrons configruations of an atom has the lowest ionisaytion enthalpy ?

A

`1s^(2)2s^(2)2p^(5)`

B

`1s^(2)2s^(2)2p^(3)`

C

`1s^(2)2s^(2)2p^(5)3s^(1)`

D

`1s^(2)2s^(2)2p^(6)`

Text Solution

Verified by Experts

The correct Answer is:
C
Amongst the given choices option (c ) has a lowest ionisation enthalpy because its electronic configuration represent the bigger size and we know that ionisation enthalpy decrease with increase of no. of orbit.
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ERRORLESS -CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES -Ordinary Thinking Objective Questions Ionisation Energy
  1. Which of the following order of ionisation energy is correct?

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  2. Which of the following order is wrong-

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  3. Which of the following electrons configruations of an atom has the low...

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  4. Which has the highest second ionisation potenitial?

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  5. Which of the following transitions involves maximum amount of energy?

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  6. Hydrogen has high ionization energy than alkali metals, due to its:

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  7. Which of the following gaseous atoms has highest value of IE?

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  8. Among the following options , the sequence of increasing first ionisat...

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  9. Which of the following element has maximum, first ionisation potential...

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  10. Spectrum of Li^(2+) is similar to that of

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  11. The correct order of reactivity of halogens is

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  12. Correct order of polarising power is

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  13. Which of the following has the highest first ionisation energy?

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  14. The ionisation energy of nitrogen is more than that of oxygen because

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  15. In a period from Li to F, ionisation potential

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  16. which of the following has the least ionisation potential?

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  17. The ionisation potential is lowest for the

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  18. The ionisation potential of hydrogen from ground state to the first ex...

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  19. First I.P. of Mg is ............. than that of Al

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  20. Which one of the following relations is correct with respect to first ...

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