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H-H, X-X and H-X bond energies are 104 K...

H-H, X-X and H-X bond energies are 104 Kcal/mole 60Kcal/mole and 101Kcal/ mole. Assuming the electronegativity of hydrogen to be 2.1 the electronegativity of unkonwn element X is `(sqrt(19)= 4.36)`

A

3.5

B

3

C

4

D

2.5

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The correct Answer is:
B
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AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -2B
  1. Successive ionisation potentials of an element M are 8.3, 25.1, 37.9, ...

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  2. The first ionisation potentials of four consecutive elements present i...

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  3. H-H, X-X and H-X bond energies are 104 Kcal/mole 60Kcal/mole and 101Kc...

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  4. The ionisation energy and electron affinity of an element are 13.0ev a...

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  5. If the ionisation energy and electron affinity of an element are 275 a...

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  6. The elements which show both positive and negative oxidation states. i...

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  7. Match the following two lists given below in view of higest oxidation ...

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  8. Strongest reducing agent and strongest oxidising agent are respectivel...

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  9. Which of the following statement is correct

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  10. The radius of La^(3+) (Z=57) is 1.06A^(@). Which one of the following ...

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  11. (A): According to Mendeleeff atomic weight of 'Be' is 9.1 but experime...

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  12. Chloride of an element A gave a neutral solution in water. In the peri...

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

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  14. The incorrect statement among the following is

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  15. The decreasing order of second ionisation potential of K, Ca, Ba is

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  16. For four elements the IP2 curve is shown. In the graph the elements re...

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  17. Regarding ionization potential some statement are given a) Ionizati...

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  18. The electron affinity values(in KJ "mole"^(-1)) of three halogens x, y...

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  19. Regarding electronegativity i) The element with maximum electro nega...

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  20. The bond energies of H - H, X - X and H - X are 104 K.Cal, 38K.Cal and...

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