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प्रश्न
The element that does NOT exhibit allotropy is
- As
- Sb
- Bi
- N
उत्तर
(c) Bi
With the exception of Bismuth, all other elements exhibit allotropy.
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संबंधित प्रश्न
Write four points of differences between properties of nitrogen and other elements of group 15.
Nitrogen does not form pentahalide.
Account for the following: Reducing character increases from NH3 to BiH3.
Arrange the following in the increasing order of property mentioned :
H3PO3, H3PO4, H3PO2 (Reducing character)
Write main differences between the properties of white phosphorus and red phosphorus.
Arrange the following in the increasing order of property mentioned :
NH3, PH3, AsH3, SbH3, BiH3 (Base strength)
The oxidation state of nitrogen in dinitrogen trioxide is ____
(a) + 1
(b) + 2
(c) + 3
(d) + 4
Give reasons H3PO3 undergoes disproportionation reaction but H3PO4 does not.
Account for the following
Bi(V) is a stronger oxidizing agent than Sb(V).
Account for the following :
N − N single bond is weaker than P − P single bond.
The most common oxidation states of nitrogen are ____________.
The strongest oxidising agent is ____________.
The correct decreasing order of basic strength is:
Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterised compound in +5 oxidation state. The compound is ______.
Which of the following element will form acidic oxides of type E2O3?
H2S is more acidic than H2O because ____________.
Which of the following statements is wrong?
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 species given in Column I with the shape given in Column II and mark the correct option.
| Column I | Column II |
| (A) \[\ce{SF4}\] | (1) Tetrahedral |
| (B) \[\ce{BrF2}\] | (2) Pyramidal |
| (C) \[\ce{BrO^{-}3}\] | (3) Sea-saw shaped |
| (D) \[\ce{NH^{+}4}\] | (4) Bent T-shaped |
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.
The enthalpy change of a reaction does not depends upon?
The electronic configuration of Cu (atomic number 29) is
The elements with zero electron affinity are
Basicity of ortho phosphoric acid is:-
When a colourless gas is passed through bromine water it decolorise, The gas is:-
The element With maximum ionisation potential is
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
