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What is %age of calcium phosphate in bone ash
20
80
60
40
Gold dissolves in “Aqua Regia” due to formation of Halide. Point out correct halide
AuF3
AuCl3
AuBr3
AuI3
Which catalyst is used in contact process
Fe2O3
V2O5
SO3
Ag2O
Out of all the elements of Group V-A the highest ionization energy is possessed by
P
N
Bi
Sb
Maximum number of unpaired electrons is in
O22-
O2+
O2
O2–
The brown gas formed, when metal reduce HNO3
N2O5
NO2
N2O3
NO
In group V-A elements the most electronegative elements is
As
P
N
Sb
Oxidation of NO in air produces
N2O3
N2O5
N2O4
N2O
Which of the following is a reddish brown gas
N2O3
N2O5
N2O3
NO2
The most electronegative element of group V-A is
Sb
P
N
Bi
The oxidation of NO in air produces
N2O3
NO2
N2O3
N2O4
Which of the following gives acidic oxide
Bi
Sb
N
As
Laughing gas is chemically
NO
NO2
N4O4
N2O
Out of all the elements of group VA, the highest ionization energy is possessed by
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