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Which pair of elements shows positive el...

Which pair of elements shows positive elecron gain enthalpy ?

A

He, N, O

B

Ne, N, Cl

C

O, Cl, F

D

N, He, Ne

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The correct Answer is:
D
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AAKASH INSTITUTE-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Assignment (Section -A)
  1. The sceening effect of d-electrons is

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  2. Correct order of radii

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  3. Which pair of elements shows positive elecron gain enthalpy ?

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  4. The elements of same group of the periodic table have

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  5. Which pair of elements has same chemical properties ?

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  6. Write the atomic number of the element present in the third period and...

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  7. Chalcogen are elements of the group

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  8. Which of the following shows diagonal relationship ?

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  9. What are representative elements?

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  10. Which group of elements represents a collection of isoelectronic speci...

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  11. Which of the following electronic configuration represents the most me...

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  12. The group of elements in which the last electron is present the anti-p...

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  13. Which general electronic configuration of the element does not represe...

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  14. Find the incorrect statement.

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  15. The effective nuclear charge across the period (from left to right)

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  16. Which electronic configuration of an element has abnormally high diffe...

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  17. Which of the following has the highest negative electron gain entahlpy...

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  18. The outermost electronic configuration of the most electronegative ele...

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  19. Match the elements given in column (I) with the most appropriat expect...

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  20. Electronegativity of the elements O,F,S and Cl increases in the order

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