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Generally the ionisation potential in a ...

Generally the ionisation potential in a period increases, but there are some exceptions. The one which is not an exception is

A

Be & B

B

N & O

C

Mg & Al

D

Na & Mg

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The correct Answer is:
D
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Discuss the variation of ionisation potentials of second period elements

The minimum amount of energy required to remove the most loosely bound electron from an isolated atom in the gaseous state in known as ionisation energy or ionisation enthalpy (IE_1) of the element. The energy required to remove the second electron from the monovalent cation is called second ionisation enthalpy (IE_2) . Similarly, we have third, fourth ..... inonisation enthalpies. The values of ionisation energy depends on a number of factors such as (i) size of the atom (ii) screening effect (iii) nuclear charge (iv) half filled and fully filled orbitals (v) shape of orbital. In a group, the ionisation energy decreases from top to bottom. In a period, the value of ionisation energy increases from left to right. Compared to the second ionisation energy of an atom, the third ionisation

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AAKASH SERIES-PERIODIC PROPERTIES-LEVEL-I (MAIN) EXERCISE-III
  1. Amongst the following elements (whose electronic configurations are gi...

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  2. The first ionization energy of Lithium will be

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  3. Which of the following is true regarding inert pair effect ?

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  4. Generally the ionisation potential in a period increases, but there ar...

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  5. Element that has the highest first ionisation energy among the followi...

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  6. The ionization potential of nitrogen is more than that of oxygen becau...

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  7. Which of the following element has the greatest tendency to lose elect...

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  8. Second ionisation potential of oxygen is

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  9. In which of the following process maximum energy is released

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  10. Ionisation energy of F^- is equal in magnitude with the electron affin...

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  11. When an electron is added, energy is absorbed in which of the followin...

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  12. The correct order of electron affinity of the elements of oxygen famil...

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  13. The I.P of X ion is equal to

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  14. Energy is released in the process of

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  15. Which of the following is the correct order of electron affinity

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  16. Pair of elements with equal values of electronegativiy

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  17. The electronegativity of the following elements increase in the order

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  18. Two elements A and B have the following electronic configurations. The...

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  19. The formula of a metallic carbonate is MCO3. The formula of that metal...

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  20. A metal forms a chloride with the formula MCl2. Formula of Phosphoric...

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