Prepare for NEET Chemistry Chemical Bonding and Molecular Structure (Fajan’s Rules) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to predict covalent character in ionic compounds.
NEET Questions / Chemistry / Chemical Bonding and Molecular Structure / Fajan'S Rules
Which of the following compounds exhibits the highest degree of covalent character according to Fajan's rules?
AlF3
AlCl3
AlBr3
AlI3
Considering Fajan's rules, arrange the following compounds in increasing order of their melting points: SnCl2, SnCl4, SiCl4, PbCl2
SnCl2 < SnCl4 < SiCl4 < PbCl2
SiCl4 < SnCl4 < SnCl2 < PbCl2
PbCl2 < SnCl2 < SnCl4 < SiCl4
SnCl4 < SiCl4 < PbCl2 < SnCl2
Which of the following pairs of ions would exhibit the greatest deviation from ideal ionic behavior according to Fajan's rules?
Na+ and Cl-
K+ and F-
Mg2+ and O2-
Hg2+ and I-
Among LiI, NaI, KI, and RbI, which compound is expected to have the highest lattice energy?
LiI
NaI
KI
RbI
Which factor contributes LEAST to the covalent character of a compound according to Fajan's rules?
Small size of the cation
Large size of the anion
High charge on the cation
High electronegativity difference between cation and anion
The high solubility of AgCl in aqueous ammonia is primarily due to:
The high polarizability of Cl-
The small size and high charge density of Ag+
Formation of a complex ion [Ag(NH3)2]+, reducing Ag+ concentration and shifting the solubility equilibrium.
The low lattice energy of AgCl
Which of the following compounds exhibits the most covalent character according to Fajan's rules?
AlF3
AlCl3
AlBr3
AlI3
Which factor does NOT influence the covalent character of a compound according to Fajan’s rules?
Cation size
Anion size
Cation charge
Cation electronegativity
Among AgCl, AgBr, and AgI, which compound is expected to have the highest melting point?
AgCl
AgBr
AgI
All have the same melting point
According to Fajan's rules, the covalent character of a compound is favored by:
Large anion and large cation
Small anion and small cation
Small anion and large cation
Large anion and small cation
