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A certain element is a metalloid that fo...

A certain element is a metalloid that forms an acidic oxide with the formula `R_(2)O_(5)`. Identify the element.

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PRADEEP-P-BLOCK ELEMENTS -IMPORTANT QUESTIONS FOR BOARD EXAMINATION
  1. NO (nitric oxide) is paramagnetic in the gaseous state but diamagnetic...

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  2. Why does R(3)P=O exist but R(3)N=O does not (R is an alkyl group )?

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  3. A certain element is a metalloid that forms an acidic oxide with the f...

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  4. PCl(5) is known but NCl(5) is not known. Or Nitrogen does not form p...

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  5. Give an example to show the effect of concentration of nitric acid on ...

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  6. Discuss the chemistry of the 'Ring Test for Nitrates' ?

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  7. Why is nitrous acid oxidant as well as reductant?

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  8. (i) Are all the five bonds in PCl(5) equivalent ? Justify. (ii) How ...

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  9. Write balanced chemical equation for the reaction of white phosphorus ...

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  10. Why is H(2)O a liquid and H(2)S a gas?

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  11. (i) Sulphur has greater tendency for catenation than oxygen. Explain. ...

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

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  13. Which aerosols deplete ozone ?

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  14. Ozone is an oxidising as well as a bleaching agent. Support this state...

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  15. Explain why HF is less viscous than water?

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  16. Write balanced equation for the reaction of Cl(2) with (i) cold and di...

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  17. Deduce the molecular shape of BrF(3) on the basis of VSEPR theory and ...

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  18. Arrange HClO(4), HClO(3), HClO(2), HClO in order of (i) decreasing aci...

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  19. HI cannot be prepared by the action of conc. H(2)SO(4) on KI because

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  20. {:(MnO(2) + HCl overset(Delta)rarr A(g)),(A(g) + F(2)(excess)overset(5...

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