Identify the correct order of solubility in aqueous medium
CuS > ZnS > Na2S
ZnS > Na2S > CuS
Na2S > CuS > ZnS
Na2S > ZnS > CuS
Which element was named as Eka-silicon in Mendeleev's classification of elements ?
Germanium
Gallium
Thallium
Selenium
Ionisation potential and electron affinity of fluorine are 17.42 and 3.45 eV respectively. What will be the ratio of electronegativity of fluorine on Mulliken scale and Pauling scale?
2.80 : 1
1.80 : 1
2.40 : 1
4.20 : 1
The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, K+, Ca2+, Mg2+, Be2+?
Mg2+ < Be2+ < K+ < Ca2+
Be2+ < K+ < Ca2+ < Mg2+
K+ < Ca2+ < Mg2+ < Be2+
Ca2+ < Mg2+ < Be2+ < K+
Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point?
RbCl
KCl
NaCl
LiCl
The set representing the correct order of ionic radius is
Li+ > Be2+ > Na+ > Mg2+
Na+ > Li+ > Mg2+ > Be2+
Li2+ > Na+ > Mg2+ > Be2+
Mg2+ > Be2+ > Li+ > Na+
Which of the following electronic configurations would exhibit the lowest ionisation energy ?
1s2
1s2,2s2 2p2
1s2,2s2 2p6
1s2,2s2 2p6,3s1
Which one of the following is correct order of increase of size ?
Mg <Al< Na+ < F -
Na+ < Al < Mg < F -
Na+ < F - < Al < Mg
Na+ < F - < Mg < Al
Chloride ion and potassium ion are isoelectronic then
their sizes are same
Cl- ion is bigger than K+ ion
K+ ion is relatively bigger
their sizes depend on other cation and anion
Ce3+, La3+, Pm3+ and Yb3+ have ionic radii in the increasing order as
La3+ < Ce3+ < Pm3+ < Yb3+
Yb3+ < Pm3+ < Ce3+ >La3+
La3+ = Ce3+ < Pm3+ < Yb3+
Yb3+ < Pm3+ < La3+ < Ce3+