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प्रश्न
The element that does NOT exhibit allotropy is
- As
- Sb
- Bi
- N
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उत्तर
(c) Bi
With the exception of Bismuth, all other elements exhibit allotropy.
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संबंधित प्रश्न
Arrange the following in the increasing order of property mentioned :
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Discuss the trends in chemical reactivity of group 15 elements.
Among the hydrides of Group-15 elements, which have the lowest boiling point?
Give reasons H3PO3 undergoes disproportionation reaction but H3PO4 does not.
Account for the following
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The correct order of oxidising power is:
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| (i) | \[\ce{F2 > Cl2 > Br2 > I2}\] | Oxidising power. |
| (ii) | \[\ce{MI > MBr > MC1 > MF}\] | Ionic character of metal halide. |
| (iii) | \[\ce{F2 > Cl2 > Br2 > I2}\] | Bond dissociation enthalpy. |
| (iv) | \[\ce{HI < HBr < HCI < HF}\] | Hydrogen-halogen bond strength. |
In \[\ce{PCl5}\], phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
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