Valence-bond theory is one of the two quantum mechanical approaches that explains bonding in molecules In some cases, valence bond theroy cannot cannot satisfactorily account for observed properties of molecules Valnce-bond theroy can explain molecular geometries .A. predicated by `VSEPR` modelB. predicated by `MO` theoryC. predicated by both (a) and (b)D. predicated by none of these

Valence-bond theory is one of the two quantum mechanical approaches th

1.	Valence-bond theory is one of the two quantum mechanical approaches that explains bonding in molecules In some cases, valence bond theroy cannot cannot satisfactorily account for observed properties of molecules Valnce-bond theroy can explain molecular geometries .A. predicated by `VSEPR` modelB. predicated by `MO` theoryC. predicated by both (a) and (b)D. predicated by none of these
Answer» Correct Answer - A

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Statement-1 : `NH_(3)` is pyramidal in shape . Statement-2 : `SiCl_(4)` and `GaCl_(4)^(-)` are isostructural . Statement-3 : `sd^(3)` hybridisation may be possibleA. TTFB. TTTC. FTTD. TFT
`O_(2)` and `N_(2)` are respectivelyA. Diamagnetic , ParamagneticB. Paramagnetic , DiamagneticC. Both the paramagneticD. Both are diamagnetic
Molecular shape of `ClF_(3) , l_(3)^(-)` and `XeO_(3)` respectively areA. T-shape , Linear , PyramidalB. Planar , Linear , TetrahedralC. T-shape , Planar , PyramidalD. Trigonal bipyramidal , Linear , Tetrahedral
In case of `XeO_(2) F_(2)` and `XeF_(6)` , Xe is withA. Same hybridization but with different geometryB. Different hybridization with same geometryC. Different hybridization and different geometryD. Same geometry and same hybridization
The shapes of `XeO_(2)F_(2)` molecule isA. trigonal bipyramidalB. square planarC. tetrahedralD. see-saw.
Which is the correct arrangement of the molecules basexd on dipole moments ?A. `BF_(3) = NH_(3) = NF_(3)`B. `BF_(3) gt NH_(3) gt NF_(3)`C. `BF_(3) lt NH_(3) lt NF_(3)`D. `BF_(3) lt NF_(3) lt NH_(3)`
Which one of the following arrangements of molecules is correct on the basis of their dipole moments ?A. `BF_(3) gt NF_(3) NH_(3)`B. `NF_(3) gt BF_(3) gt NH_(3)`C. `NH_(3) = NF_(3) gt BF_(3)`D. `NH_(3) gt NF_(3) gt BF_(3)`
The crystal lattice of electro covalent compounds is composed ofA. AtomsB. MoleculesC. Oppositely charged ionsD. Both molecules and ions
Statement 1 : All molecules with polar bonds may not have dipole moments Statement 2 : Dipole moment is a vectot quantity and bond dipoles may cancel out.A. Statemetn-1 is true, Statrment-2 is also true, Statement -2 is the correct explanation of statement-1B. Statement -1 is true , Statement 2 is also true, Statement-2 is not the correct ezplanation of Statement-1C. Statement-1 is true, Statement-2 is false.D. Statement-1 is false, Statement-2 is true.
The crystal lattice of electro covalent compounds is composed ofA. atomsB. moleculesC. oppositeoly charged ionsD. both molecules and ions.

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