Multiple Choice QuestionsThe species in which the N atom is in a state of sp hybridization is:
NO2-
NO3-
NO2
NO2
The ionic radii (in Å) of N3–, O2– and F– are respectively:
1.36, 1.40 and 1.71
1.36, 1.71 and 1.40
1.71, 1.40 and 1.36
1.71, 1.40 and 1.36
C.
1.71, 1.40 and 1.36
Number of electrons in N3- = 7+3 = 10
Number of electrons in O2- = 8+2 = 10
Number of electrons in F- = 9+1 = 10
Since, all the three species have each 10 electrons hence they are isoelectronic species.
It is considered that, in case of isoelectronic species as the negative charge increase, ionic radii increase and therefore the value of ionic radii are
N3- = 1.71 (highest among the three)
O2- = 1.40
F- = 1.36 (lowest among the three)
N3- > O2-> F-
In which of the following pairs of molecules/ions, both the species are not likely exist?
Which of the following exists as covalent crystals in the solid state?
Iodine
Silicon
Sulphur
Sulphur
Stability of the species Li2, Li2− and Li2+ increases in the order of:
Li2 < Li2+ < Li2-
Li2− < Li2+ < Li2
Li2< Li2− < Li2+
Li2< Li2− < Li2+
In which of the following pairs the two species are not isostructural?
CO32- and NO3-
PCl+4 and SiCl4
PF5 and BrF5
PF5 and BrF5
Among the following, the maximum covalent character is shown by the compound
FeCl2
SnCl2
AlCl3
AlCl3
The hybridization of orbitals of N atom in NO3-, NO2+ and NH4+ are respectively
sp, sp2,sp3
sp2 , sp, sp
sp, sp3 , sp2
sp, sp3 , sp2
The group having isoelectronic species is
O2– , F–, Na+ , Mg2+
O– , F–, Na, Mg+
O2–, F–, Na ,Mg2+
O2–, F–, Na ,Mg2+
Using MO theory predict which of the following species has the shortest bond length?
O22+
O2+
O2−
O2−
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