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+
A.
Cu2+ oxidises Fe
The standard reduction potential of Fe2+/Fe is less than that of Cu2+/Cu, hence Fe is more electropositive than copper. Hence, Cu2+ can oxidise Fe.
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