The correct order of the O-O bond length in O2, H2O2 and O3 is
O2 > O3 > H2O2
O3 > H2O2 > O2
O2 > H2O2 > O3
H2O2 > O3 > O2
The weakest among the following types of bond is
ionic
covalent
metallic
H-bond
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
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is
2
3
4
1
Linear combination of two hybridised orbitals belonging to the two atoms, each having one electron leads to a
Sigma bond
Double bond
Coordinate bond
Pi-bond
The molecule which does not exhibit dipole moment is
NH3
CHCI3
H2O
CCI4
The boiling point of p-nitrophenol is higher than that of o-nitrophenol because
NO2 group at p-posiiton behave in a different way from that at o-position
Intramolecular hydrogen bonding exists in p-nitro phenol
There is intermolecular hydrogen bonding in p-nitrophenol
p-nitrophenol has a higher molecular weight than o-nitrophenol
N2and O2, are converted into monoanions N-2 and O-2 respectively. Which of the following statements is wrong?
In N2, the N-N bond weakens
In O-2, O-O bond length increases
In O-2, bond order decreases
N-2, becomes diamagnetic
Which one is not paramagnetic among the following? [At. no. Be = 4, Ne = 10, As = 33, Cl = 17]
Cl-
Be
Ne2-
As-
An sp3- hybrid orbital contains
1/4 s- character
1/2 s- character
1/3 s-character
2/3 s- character
