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Which of the following is not correct re...

Which of the following is not correct regarding bond energies

A

The extent of overlap of the atomic orbitals decreases as the size of the atoms increase

B

Among the halogens the bond energy of `F_(2)` is abnormally high (159 KJ `"mole"^(-1))`

C

The `F_(2)` molecule it self has a notorisously weak bond `159KJ"mole"^(-1))` compared with chlorine `243KJ"mole"^(-1)`

D

According Mulliken `ppi-dpi` bonding is not possible in fluorine

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The correct Answer is:
B
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AAKASH SERIES-VII GROUP ELEMENTS-OBJECTIVE EXERCISE -2
  1. The order of melting point , boiling point and densities of halogens

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  2. Which of the following species has four lone pairs of electrons in its...

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  3. Which of the following is not correct regarding bond energies

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  4. Fluorine is a stronger oxidising agent than chlorine in aqueous soluti...

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  5. Easiest to perform in the following is

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  6. Hydrogen bonding does not play any role in boiling of

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  7. Bond dissociation energies of HF, HCl, HBr follow the order

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  8. Which of the following reaction does not takes place.

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  9. Which of the following shows variation of BE of halogens

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  10. In the reaction 3Br(2) + 6CO(3)^(2-) + 3H(2)OrarrBr^(-) + BrO3 + 6HCO...

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  11. Which one of the following ion has the highest value of ionic radius?

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  12. Poor conductor of electricity is

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  13. No gas is liberated when the following HX is treated with MnO(2)and co...

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  14. Which of the following does not form precipitate with AgNO3 ?

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  15. Which redical can bring about the highest oxidation state of a transit...

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  16. I) Fluorine reacts with cold , dilute alkalies liberating O(2) gas. ...

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  17. Which of the following statements is correct about halogens ?

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  18. KMnO4 acts as an oxidising agent in alkaline medium, when alkaline KM...

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  19. Gaseous HCl is a poor conductor of electricity while its aqueous solut...

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  20. Concentrated hydrochloric acid when kept in open air sometimes produce...

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