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Oxygen and sulphur in vapour phases are ...

Oxygen and sulphur in vapour phases are paramagnetic in nature. Explain why ?

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Due to presence of unpaired electrons in anti-bonding molecular orbitals in them.
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CBSE COMPLEMENTARY MATERIAL-P-BLOCK ELEMENTS-VERY SHORT ANSWER TYPE QUESTIONS
  1. Which one of the following is not oxidized by O(3) ? State the reason ...

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  2. Why does oxygen not show an oxidation state of + 4 and + 6 ?

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  3. Oxygen and sulphur in vapour phases are paramagnetic in nature. Explai...

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  4. The stability of the halides of group 16 elements decreases in the ord...

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  5. Why are the two S – O bonds in SO(2) molecule have equal strength ?

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  6. Why is K(a(2)) ltlt K(a(1)) for H(2) SO(4) in water ?

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  7. H2 O is a liquid while H2 S is a gas.

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  8. The electron gain enthalpy with negative sign for oxygen (− 141 KJ mol...

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  9. Why is dioxygen a gas but sulphur a solid?

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  10. In the preparation of H(2)SO(4) by Contact process, why is SO(3) not ...

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  11. Explain why fluorine forms only one oxoacid, HOF.

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  12. Why HF is the weakest acid and HI is the strongest ?

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  13. Explain why halogens are strong oxidizing agents.

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  14. I(2) is more soluble in KI than in water. Why ?

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  15. What is cause of bleaching action of chlorine water ? Explain it with ...

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  16. Electron gain enthalpy of fluorine is less than that of chlorine - exp...

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  17. Why can’t we prepare HBr by heating KBr with sulphuric acid ?

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  18. Explain why : ICl is more reactive than I(2) ?

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  19. Which oxide of iodine is used for the estimation of carbon mono oxide ...

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  20. Arrange the following oxoacids of chlorine in increasing order of acid...

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