What is the effect of increasing pressure on the dissociation of PCl5 according to the equation?
PCl5 (g) PCl3 (g) + Cl2 (g)
Dissociation decreases
Dissociation increases
Dissociation does not change
None of the above
The ground state term symbol for an electronic state is governed by :
Heisenberg's principle
Hund's rule
Aufbau principle
Pauli exclusion principle
The following salt shows maximum covalent character:
AlCl3
MgCl2
CsCl
LaCl3
A.
AlCl3
According to Fajan's rule, as the charge on cation increase its size decreases. As a result its tendency to polarize anion increases. This brings more and more covalent character to electrovalent compounds.
Among AlCl3, LaCl3, MgCl2 ans CsCl, size of Al3+ of (AlCl3) is smallest.
Al3+ polarises anion to highest extent and has maximum covalent character.
Pauling's electronegativity values for elements are useful in predicting :
polarity of bonds in molecules
position of elements in electromotive series
co-ordination number
dipole moment of various molecules
The trigonal bipyramidal geometry results from the hybridisation :
dsp3 or sp3d
dsp2 or sp2d
d2sp3 or sp3d2
d3p2 or d2p3
Two moles of PCl5 were heated in a closed vessel of 2 L. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl3. The value of equilibrium constant is :
0.53
0.267
2.63
5.3
What is the effect of having the pressure by doubling the volume on the following system at 500°C?
H2 (g) + I2 (g) 2HI (g)
Shift to reactant side
Shift to product formation
Liquefaction of HI
No effect