CBSE
Using MO theory, predict which of the following species has the shortest bond length?
Assuming that Hund's rule in violated,the bond order and magnetic nature of the diatomic molecule B2 is:
1 and diamagnetic
0 and diamagnetic
1 and paramagnetic
O and paramagnetic
Number of orbitals in L energy level
1
2
3
4
Hybridization of 1 and 2 carbon atom in
H2 = = CH2 are
sp, sp
sp2, sp2
sp2, sp
sp3, sp2
Which of the following gives correct arrangement of compounds involved based on their bond strength ?
HF > HCl > HBr > HI
HI > HBr > HCl > HF
HF > HBr > HCl > HI
HCl > HF > HBr > HI
Which of the following is paramagnetic?
CO
N2
O2
H2O2
The shape of an orbital is determined by
n
l
m
s
The enthalpies of all elements in their standard states are
zero
>0
<0
unity
The hybridisation and shape of IF5 are respectively:
sp3d , trigonal bipyramide
sp3d , see saw
sp3d , square pyramidal
sp3d , pentagonal pyramidal
H-bond is strongest in
C2H5OH
H-F
H2O
CH3COCH3