Among the following, the equilibrium which is not affected by an increase in pressure is
C(s) + H2O (g) CO(g) + H2(g)
3Fe(s) + 4H2O (g) Fe3O4 (s) + 4H2(g)
2SO3(g) 2SO2(g) + O2 (g)
H2 (g) + I2(s) 2Hi(g)
Ksp of CaSO4 is 4 × 10-12. CaSO4 is precipitated on mixing equal volumes of the following solutions.
3 × 10-10 M CaCl2 and 3 × 10-6 M (NH4)2SO4
4 × 10-6 M CaCl2 and 3 × 10-6 M (NH4)2SO4
6 × 10-6 M CaCl2 and 3 × 10-16 M (NH4)2SO4
In all the above cases
C.
6 × 10-6 M CaCl2 and 3 × 10-16 M (NH4)2SO4
A precipitate will form when two solutions are mixed if the ion product is greater than the solubility product. This solution is called super saturated solution.
[Ca2+][SO] > Ksp
What is pH of 2 x 10-8 molar HCl solution? Here, log 2 = 0.301 and log 3 = 0.477.
6.92
9.5
5.4
7.7
Which one of the following species acts as both Bronsted acid and base?
H2PO
HPO
HPO
All of these
The reaction, SO2 + O2 → 2SO2 + Heat.
The equilibrium reaction proceeds in forward direction by
addition of O2
removal of O2
addition of inert gas
cannot proceed
Which is soluble in NaNO3 and dil. HCl mixture and forming salt?
(CH3)3CNH2
(CH3)2CHNH2
(CH3)2NH
(CH3)3N
When one mole of A and one mole of B were heated in one litre flask at T(K), 0.5 mole of C was formed in the equilibrium, A + B C + D the equilibrium constant, Kc is
0.25
0.5
1
2
If the solubility of Ca3(PO4)2 in water is x mol L-1, its solubility product in mol5L-5 is
6x5
36x5
64x5
108x5
The buffer system which helps to maintain the pH of blood between 7.26 to 7.42, is
H2CO3 /HCO
NH4OH/ NH4Cl
CH3COOH/ CH3COO-
CH3COONH4
Which one of the following is correct?
The equilibrium constant (Kc) is independent of temperature
The value of Kc is independent of initial concentrations of reactants and products
At equilibrium, the rate of the forward reaction is twice the rate of the backward reaction.
The equilibrium constant (Kc) for the reaction