Identify the non-polar molecule in the set of compounds given :
HCl, HF, H2, HBr
H2
HCl
HF, HBr
HBr
Which of the following pairs involves isoelectronic ions ?
Mn3+ and Fe2+
Mn2+ and Fe3+
Cr3+ and Mn2+
Fe2+ and Co2+
Which is the correct order of electronegativity?
F > N < O < C
F > N > O > C
F > N > O < C
F < N < O = C
A.
F > N < O < C
Among the given options, correct order of electronegativity is -
F > O > N > C or F > N < O > C
The solubilities of carbonates decrease down the magnesium group due to a decrease in
lattice energies of solids
hydration energies of cations
inter-ionic attraction
entropy of solution formation
Due to the presence of an unpaired electron free radicals are
cations
anions
chemically inactive
chemically reactive
Ionic radii are
inversely proportional to effective nuclear charge
inversely proportional to square of effective nuclear charge
directly proportional to effective nuclear charge
directly proportional to square of effective nuclear charge
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
Cl < F < S < O
O < S < F < Cl
S < O < Cl < F
F < Cl < O < S