then the formation constant of [Ag(NH3)2]+ is
6.08 × 10-6
6.08 × 106
6.08 × 10-9
None of these
0.1 mole of CH3NH2 (Kb = 5 × 10-4 ) is mixed with 0.08 mole of HCl and diluted to one litre. What will be the H+ concentration in the solution?
8 × 10-2 M
8 × 10-11 M
1.6 × 10-11 M
8 × 10-5 M
A Physician wishes to prepare a buffer solution at pH =3.58 that efficiently resist changes in pH yet contains only small concentration of the buffering agents. Which one of the following weak acid together with its sodium salt would be best to use ?
m-chlorobenzoic acid (pKa=3.98)
P-Chlorocinnamic acid(pKa = 4.41)
2,5 -dihydroxy benzoic acid (pKa=2.97)
Acetoacetic acid(pKa=3.58)
At constant temperature, the equilibrium constant (K p) for the decomposition reaction,
where , p= pressure, x= extent of decomposition. Which one of the following statement is true?
K p increases with increase of p
K p increases with increase of x
K p increases with decrease of x
Kp remains constant with change in p and x
The concentration of CO2 which will be in equilibrium with 2.5 × 10-2 mol L-1 of CO at 100°C for the reaction will be
0.5 × 10-2 mol L-1
12.5 × 10-2 mol L-1
2 × 10-2 mol L-1
The solubility of sparingly soluble salt, AB2 in water is 1.0 × 10-5 mol L-1 .Its solubility product will be
4 × 10-10
1 × 10-15
1 × 10-10
4 × 10-15
The pH of 0.1 M solution of a weak acid is 3. What is the value of the ionization constant for the acid?
0.1
10-3
10-5
10-7
Starting with one mole of O2 and two moles of SO2, the equilibrium for the formation of SO3 was established at a certain temperature. If V is the volume of the vessel and 2x is the number of moles of SO3 present, the equilibrium constant will be
The pH value of a 10 M solution of HCl is
less than 0
Equal to 0
Equal to 1
Equal to 2
Solubility product constant (Ksp) of salts of types MX , MX2 and M3X at temperature ' T ' are 4.0 × 10-8 , 3.2 × 10-14 and 2.7 × 10-15 respectively. Solubilities (mol dm-3) of the salts at temperature ' T ' are in the order
MX > MX2 > M3X
M3X > MX2 > MX
MX2 > M3X > MX
MX > M3X > MX2
