CBSE
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
H-bond is strongest in
C2H5OH
H-F
H2O
CH3COCH3
Number of orbitals in L energy level
1
2
3
4
The hybridisation and shape of IF5 are respectively:
sp3d , trigonal bipyramide
sp3d , see saw
sp3d , square pyramidal
sp3d , pentagonal pyramidal
The shape of an orbital is determined by
n
l
m
s
Which of the following is paramagnetic?
CO
N2
O2
H2O2
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
Using MO theory, predict which of the following species has the shortest bond length?
Hybridization of 1 and 2 carbon atom in
H2 = = CH2 are
sp, sp
sp2, sp2
sp2, sp
sp3, sp2
The enthalpies of all elements in their standard states are
zero
>0
<0
unity