CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCl, the approximate lattice energy of CaO is
Since, interionic distances in CaO and NaCl are similar, (larger cation has smaller anion and vice versa) r is almost the same. Therefore, lattice energy depends only on charge.
Since, the magnitude of charge on ions is same ie, unity and that on ions is 2 each, therefore, the lattice energy of CaO is four times the lattice energy of NaCl, ie, 4U.
The correct sequence of decreasing dipole moments of the following molecules will be
Which of the following species is not paramagnetic?
Which of the following has maximum dipole moment?
The correct order of decreasing bond length for , NO and NO+ is
Among the species: which has the weakest C – O bond?
Which bond angle would result in the maximum dipole moment for the triatomic molecule yxy?
The dipole moment of HBr is and interatomic spacing is The %ionic character of HBr is
In a polar molecule, the ionic charge is If the interionic distance is unit, then the dipole moment is
In which one of the following cases, breaking of covalent bond takes place?