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NCERT-THE P-BLOCK ELEMENTS-EXERCISE
- How is ammonia manufactured industrially?
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- Illustrate how copper metal can give different product on reaction wit...
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- Give the resonating structures of NO(2) and N(2)O(5).
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- The HNH angle value is higher than HPH, HAsH and HSbH angles. Why?
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- Why does R3P=O exist but R3N=O does not (R= alkyl group)?
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- Explain why NH(3) is basic while BiH(3) is only feebly basic ?
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- Nitrogen exists as diatomic molecule and phosphorus as P(4). Why ?
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- Write main differences between the properties of white phosphorus and ...
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- Why does nitrogen show catenation properties less than phosphorus.
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- Give the disproportionation reaction of H3PO3.
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- Can PCl5 act as an oxidising as well as a reducing agent? Justify.
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- Justify the placement of O, S, Se, Te and Po in the same group of the ...
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- Why is dioxygen a gas but sulphur a solid?
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- Knowing the electron gain enthalpy values for O rarr O^(Ө) and O rarr ...
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- Which aerosols deplete ozone?
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- Describe the manufacture of H(2)SO(4) by contact process?
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- How is SO2 an air pollutant?
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- Why are halogens strong oxidising agents ?
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- Explain why fluorine forms only one oxoacid, HOF.
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- Explain why inspite of nearly the same electronegativity, nitrogen for...
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