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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- Why does PCI3, fumes in moist air ?
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- Explain, why all the bonds In PCI5are not identical.
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- Write basicity of H3PO2,H3PO3 and H3PO4 .
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- When iron reacts with HCI, ferrous chloride is formed not ferric chlor...
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- How can you prepare CI2 from HCl and HCI from Cl2 ?
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- Arrange as indicated - HF,HCL,HBr,HI (increasing volatility order)
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- Arrange as indicated -NH3 , PH3 , AsH3 , SbH3 (increasing basic stre...
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- Arrange the halogen acids in increasing order of their acidic strength...
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- Arrange as indicated - H2O , H2S , H2Se , H2Te ( increasing bond ang...
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- On the basis of VSEPR theory explain the shape of BrF3 molecule .
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- Describe the geometry of XeF6.
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- Between F2 and Cl2 which has more oxidising power and why?
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- Write three anomalous behaviour of Nitrogen.
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- Write three properties of oxygen by which it differs from its family m...
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- How do you account for the following : Sulphur is paramagnetic in vapo...
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- How do you account for the following : Enthalpy of dissociation of Cl2...
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- On heating a compound A gives compound 'B' which is a constituent of a...
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- Fluorine has less -ve value of electron gain enthalpy than chlorine. E...
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- Why are the Gr-18 elements called as inert gases ?
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- Write two uses of Helium.
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