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प्रश्न
Account for the following :
Noble gases have very low boiling points.
उत्तर
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संबंधित प्रश्न
The element that does NOT exhibit allotropy is
- As
- Sb
- Bi
- N
Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, compare the oxidising power of F2 and Cl2.
The strongest oxidising agent is ____________.
Ionic radii (in Å) of As3+, Sb3+ and Bi3+ follow the order:
Which of the following is the strongest reducing agent?
Which of the following orders are correct as per the properties mentioned against each?
| (i) | \[\ce{As2O3 < SiO2 < P2O3 < SO2}\] | Acid strength. |
| (ii) | \[\ce{AsH3 < PH3 < NH3}\] | Enthalpy of vapourisation. |
| (iii) | \[\ce{S < O < Cl < F}\] | More negative electron gain enthalpy. |
| (iv) | \[\ce{H2O > H2S > H2Se > H2Te}\] | Thermal stability. |
Match the items of Columns I and II and mark the correct option.
| Column I | Column II | |
| (A) | Its partial hydrolysis does not | (1) He |
| (B) | It is used in modern diving apparatus | (2) XeF6 |
| (C) | It is used to provide inert atmosphere for filling electrical bulbs |
(3) XeF4 |
| (D) | Its central atom is in sp3d2 hybridisation | (4) Ar |
In \[\ce{PCl5}\], phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
Account for the following:
Zinc is a comparatively a soft metal, iron and chromium are typically hard.
In a regular octahedral molecule mx6, the number of X – M – X bouds at 180° are:-
