Chemistry - CHEMICAL BONDING Question with Solution | TestHub
Four independently supplied data sets are: lattice-controlled melting values (K) for LiF, LiCl, LiBr, LiI =1121, 883, 825, 742; water solubilities (g per 100 g water at 25°C) for MgSO₄, CaSO₄, SrSO₄, BaSO₄=35, 0.21, 0.013, 0.00025; first ionization energies (kJ mol⁻¹) for O, O₂=1314, 1165; and ideal VSEPR angles: NO₂⁺ = 180°; NO₂⁻ < 120°. Which proposed pair of conclusions is correct?
Options:
Answer:
Solution:
The ionization values give O₂<O. Counting nitrogen domains gives linear AX₂ for nitronium but bent AX₂E for nitrite; equivalent bonds do not imply linearity. The melting and solubility series both decrease along the lists, rejecting A and C. D reverses the measured ionization trend and confuses resonance equivalence with shape. B alone survives all independent checks.
