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The most electronegative element of group V-A is
Bi
P
Sb
N
Which of the following gives acidic oxide
N
As
Bi
Sb
What is %age of calcium phosphate in bone ash
40
60
20
80
Which of the following is a reddish brown gas
NO2
N2O3
N2O3
N2O5
Which metal is redered passive by HNO3due to formation of a film of metal oxide over the metal
Sn
CO
Mn
Pt
The brown gas formed when metal reduces HNO3
N2O3
N2O5
NO2
NO
Out of all the elements of group VA, the highest ionization energy is possessed by
Bi
Sb
As
N
In group V-A elements the most electronegative elements is
Sb
N
P
As
Which catalyst is used in contact process
V2O5
SO3
Ag2O
Fe2O3
The brown gas formed, when metal reduce HNO3
NO
N2O5
N2O3
NO2
Gold dissolves in “Aqua Regia” due to formation of Halide. Point out correct halide
AuCl3
AuBr3
AuI3
AuF3
Out of all the elements of Group V-A the highest ionization energy is possessed by
Bi
N
Sb
P
Maximum number of unpaired electrons is in
O2
O22-
O2–
O2+
Oxidation of NO in air produces
N2O
N2O4
N2O3
N2O5
Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element
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