Which one of the following formulae does not correctly represent the bonding capacities of the atoms involved?
Which one is not paramagnetic among the following? [At. no. Be = 4, Ne = 10, As = 33, Cl = 17]
Cl-
Be
Ne2-
As-
Which one of the following is the correct order of interactions?
Covalent < hydrogen bonding < van der Waals' < dipole - dipole
Van der Waals' < hydrogen bonding < dipole-dipole < covalent
Van der Waals' < dipole-dipole < hydrogen bonding < covalent
Dipole-dipole < van der Waals' < hydrogen bonding < covalent
Which of the following pairs will form the most stable ionic bond?
Na and Cl
Mg and F
Li and F
Na and F
The molecule which does not exhibit dipole moment is
NH3
CHCI3
H2O
CCI4
The weakest among the following types of bond is
ionic
covalent
metallic
H-bond
Which of the following is not a correct statement?
The electron-deficient molecules can act as Lewis acids.
The canonical structures have no real existence.
Every AB5 molecule does infact have square pyramid structure.
Multiple bonds are always shorter than corresponding single bonds.
Which of the following statement is not correct?
Double bond is shorter than a single bond
Sigma bond is weaker than a π (pi) bond
Double bond is stronger than a single bond
Covalent bond is stronger than hydrogen bond
The number of anti-bonding electron pairs in O2-2 molecular ion on the basis of molecular orbital theory is (At no of O is 8).
5
2
4
6
In which of the following pairs, the two species are isostructural?
SF4 and XeF4
SO2-3 and NO-3
BF3 and NF3
BrO-3 and XeO3