Which of the following two are isostructural?
NH3, BF3
PCI5, ICI5
In ion, the formal charge on each oxygen atom and P-O bond order respectively are
- 0.75, 0.6
- 0.75, 1.0
- 0.75, 1.25
-3, 1.25
Which one is not para-magnetic among the following? [At. No. Be = 4, Ne = 10, As = 33, Cl = 17]
Cl-
Be
Ne2+
As-
Among the following which compound will show the highest lattice energy ?
KF
NaF
CsF
RbF
Which of the following statement is not correct for sigma and pi bonds formed between two carbon atoms ?
Free rotation of atoms about a sigma bond is allowed but not in case of a pi bond
Sigma bond determines the direction between carbon atoms but a pi bond has no primary effect in this regard
Sigma bond is stronger than a pi bond
Bond energies of sigma and pi bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectivley.
Equilateral shape has
sp-hybridisation
sp2-hybridisation
sp3-hybridisation
dsp2-hybridisation
Which of the following species is para-magnetic ?
NO
CO
CN-
AsF5 molecule is trigonal bipyramidal. The hybird orbitals used by As atoms for bonding are
dxy,s,px,py,pz
s,px,py,pz,dxy
dx2-y2,s,px,py,pz
When the hybridisation state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridised orbitals.
decreases gradually
decreases considerably
is not affected
increases progressively
Which one of the following molecules will from a linear polymeric structure due to hydrogen bonding ?
NH3
H2O
HCl
HF
