Advertisements
Advertisements
Question
The element that does NOT exhibit allotropy is
- As
- Sb
- Bi
- N
Advertisements
Solution
(c) Bi
With the exception of Bismuth, all other elements exhibit allotropy.
APPEARS IN
RELATED QUESTIONS
Nitrogen does not form pentahalide.
Account for the following:
N2 is less reactive at room temperature.
Why does R3P=O exist but R3N=O does not (R = alkyl group)?
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)
Among the hydrides of Group-15 elements, which have the maximum basic character?
Among the hydrides of Group-15 elements, which have the highest bond angle?
Account for the following :
Noble gases have very low boiling points.
What is the action of sodium on arsenic.
Explain the geometry of [Cu(NH3)4]2+ on the basis of hybridisation [ At. No. Cu = 29 ].
Give a reason for the following:
E° value for (Mn2+|Mn) is negative whereas for (Cu2+|Cu) is positive.
Account for the following :
Acidic character decreases from N2O3 to Bi2O3 in group 15.
Give reasons for the following:
E⁰ value for (Mn3+|Mn2+) is highly positive than that for (Cr3+|Cr2+) couple.
Maximum covalency of nitrogen is ______.
Which among the following forms basic oxide?
Ionic radii (in Å) of As3+, Sb3+ and Bi3+ follow the order:
The correct decreasing order of basic strength is:
Covalency of nitrogen is restricted to ______.
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 |
The elements with atomic numbers 9, 17, 35, 53 and 85 belong to
The elements which are characterized by the outer electronic configuration ns1 to ns2 np6 are collectively called
The elements with zero electron affinity are
The basic strengths of the hydrides group is elements decrease in the order.
P4O10 is an anhydride of
Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and P4O10 (in 4 : 1 ratio) is ______.
