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The first (Delta(i)H(1)) and second (Del...

The first `(Delta_(i)H_(1))` and second `(Delta_(i)H_(2))` ionization enthalpies `("in kJ mol"^(-1))` and the electron gain enthalpy `(Delta_(eg)H)("in kJ mol"^(-1))` of the elements I, II, III, IV and V are given below

the least reactive non - metal and the most reactive metal of these are respectively

A

I and V

B

V and II

C

II and V

D

IV and V

Text Solution

Verified by Experts

The correct Answer is:
C
The most reactive metal will be the one having lowest ionisation enthalpy and the least reactive non-metal will be the one having lowest or positive electron gain enthalpy.
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The first (DeltaH_(1)) and second (DeltaH_(2)) ionisation enthalpies (in kJ mol^(-1)) and the (DeltaH_(eg)) electron gain enthalpy (in kJ mol^(-1)) of a elements are given below: Based on the above information match the following columns.

Ionisation enthalpy (Delta_(i)"H kJ mol"^(-1)) for the elements of group 13 follows the order.

Ionisation enthalpy (Delta_(t)H_(l) "in" kJ mol^(-1)) for the elements of group-13 follows the order

The first (Delta_(i)H_(1)) and second (Delta_(i)H_(2)) ionisation enthalpies ("in" kJ mol^(-1)) and the (Delta_(eg)H^(ө)) electron gain enthalpy ("in" kJ mol^(-1)) of a few elements are given below: {:("Elements",(Delta_(i)H_(1)),(Delta_(i)H_(2)),Delta_(eg)H^(ө)),(I,520,7300,-60),(II,419,3051,-48),(III,1681,3374,-328),(IV,1008,1846,-295),(V,2372,5251,+48),(VI,738,1451,-40):} Which of the above elements is likely to be a. the least reactive element. b. the most reactive metal. c. the most reactive non-metal. d. the least reactive non-metal. e. the metal which can form a stable binary halide of the formula MX (X=halogen). f. the metal which can form a predominantly stable covalent halide of the formula MX(X=halogen).

The second electron gain enthalpies (in kJ mol^(-1) ) of oxygen and sulphur respectively are:

Why do halogens have high electron gain enthalpies (i.e. -Delta_(eg)H^(o.)) ?

MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS (B)) (MCQs)
  1. The set representing the correct order of ionic radius is

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  2. Which of the following sets will have highest hydration energy and hig...

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  3. The first (Delta(i)H(1)) and second (Delta(i)H(2)) ionization enthalpi...

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  4. The correct sequence which shows decreasing order of the ionic radii o...

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  5. The second ionization energies of Li, Be, B and C are in the order

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  6. Which of the following is the largest in size ?

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  7. An element belongs to group 15 and third period of the periodic table....

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  8. Whicn one fo the following has the lowest ionisation enthalpy ?

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  9. The correct decreasing order of first ionisation enthalpies of five el...

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  10. The correct order of decreasing electronegativity values among the ele...

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  11. Considering the elements B, C, N, F and Si, the correct order of their...

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  12. the correct order of electron gain enthalpy with negative sign of F,Cl...

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  13. Among the following, the element with highest ionisation potential is

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  14. The correct order of ionisation energy of C, N, O and F is

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  15. The correct order of electronegativities of N,O, F and P is

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  16. The ionic radii of N^(3-) O^(2-), F^-, Na^+ follows the order

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  17. The increasing order of the ionic radii of the given isoelectronic spe...

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  18. Which one of the following sets of ions represents the collection of i...

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  19. Which of the followng noble gases has the highest positive electron ga...

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  20. Which of the following represents the correct order of increasing firs...

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