There is a general understanding of ionic radius based on the nuclear charges and the number of electrons surrounding the nucleus which generally works very well. Which one of the following represents the correct decreasing order ofionic radius for C4-, N3-, O2- and F-?
C4- > N3- > O2- > F-
F-> O2- > N3- > C4-
O2- > N3- > C4- > F-
F- > N3- > C4- > O2-
The ions N3-, O2-, F-, Na+, Mg2+ are isoelectronic. Their ionic radii show
an increase from N3- to F- and then decrease from N+ to Mg2+
a decrease from N3- to F- and then increase from Na+ to Mg2+
a significant increase from N3- to Mg2+
a significant decrease from N3- to Mg2+
Which of the following pairs of ions cannot be separated by H2S in dilute HCl?
Bi3+, Sn4+
Al3+, Hg2+
Cu2+, Zn2+
Ni2+, Cu2+
A.
Bi3+, Sn4+
Among the given pairs of ions, Bi3+ and Sn4+ cannot be seperated by H2S in dilute HCl because both are present in second group and both are precipitated by H2S in dilute HCl as Bi2S3 and SnS2.
The radius of H-atom in its ground state is 0.58Å .The radius of, 3Li2+ ithe similar state is
0.1777 Å
0.706 Å
1.06 Å
0.058 Å
The correct order of ionization energies is
Cu > Ag > Au
Cu > Au > Ag
Au > Cu > Ag
Ag > Au > Cu
The set representing the correct order of ionic radius is
Li+ > Be2+ > Na+ > Mg2+
Na+ > Li+ > Mg2+ > Be2+
Li+ > Na+ > Mg2+ > Be2+
Mg2+ > Be2+ > Li+ > Na+