If equilibrium constant for reaction 2AB A2 + B2 is 49, then the equilibrium constant for reaction
AB A2 + B2, will be;
7
280
49
0.01
According to Hess's law, the heat of reaction depends upon :
initial condition of reactants
initial and final conditions of reactants
intermediate path of the reaction
end conditions of reactants
A reaction is catalysed by 'X' Here 'X' :
decreases the rate constant of reaction
does not affect the equilibrium constant of reaction
decreases the enthalpy of reaction
decreases the activation energy
For a reaction; A + B product, it was found that rate of reaction increases four times if concentration of 'A' is doubled, but the rate of reaction remains unaffected if concentration of 'B' is doubled. Hence, the rate law for reaction is :
rate = k[A][B]
rate = k[A]2
rate = k [A]2[B]1
rate = k [A]2[B]2
The E° for half cells Fe/Fe2+ and Cu/Cu2+ are -0.44 V and +0.32 V respectively. Then :
Cu2+ oxidises Fe
Cu2+ oxidises Fe2+
Cu oxidises Fe2+
Cu reduces Fe2+
Transition metals are related to which block ?
's' block
'p' block
'd' block
none of these
C.
'd' block
d-block elements are called transition elements. These show variable valency due to their incomplete d-subshell.
The general electronic configuration of transition elements, is :
(n-1)d1-5 ns0
(n-1)d1-10 ns1
(n-1)d1-10 ns2
(n-1)d1-10 ns1-2
Which one of these, is not a colligative property ?
vapour pressure
osmotic pressure
lowering in freezing point
Elevation in boiling point