The values of Kp1 and Kp2 for the reactions
are in ratio of 9 : 1 . If degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio
3 : 1
1 : 9
36 : 1
1 : 1
The compound whose aqueous solution has the highest pH is
NaCI
NaHCO3
Na2CO3
NH4CI
Solution of 0.1 NH4OH and 0.1 N NH4CI has pH 9.25, then find out pKb of NH4OH
9.25
4.75
3.75
8.25
Ionisation constant of CH3COOH is 1.7 × 10-5 and concentration of H+ ions is 3.4 × 10-4. Then, find out initial concentration of CH3COOH molecules.
3.4 × 10-4
3.4 × 10-3
6.8 × 10-4
6.8 × 10-3
The pH value of a 10 M solution of HCI is
less than 0
equal to 0
equal to 1
equal to 2
A weak acid, HA, has a Ka of 1.00 × 10-5 . If 0.100 mole of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
99.0%
1.00 %
99.9 %
0.100 %
Calculate the pOH of a solution at 25oC that contains 1 ×10-10 M of hydronium ions.
7.00
4.00
9.00
1.00
Aqueous solution of acetic acid contains
CH3COO- and H+
CH3COO- , H3 O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3COOH, CH3COO- and H+
The hydride ion H- is stronger base that its hydroxide ion OH-. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in water ?
2H- (aq) + H2 O(l) → H2 O + H2 + 2e-
H- (aq) + H2 O(l) → OH- + H2
H- + H2 O(l) → no reaction
None of the above
The solubility product of AgI at 25o C is 1.0 × 10-16 mol2 L-2. The solubility of AgI in 10-4 N solution of KI at 25oC is approximately (in mol L-1)
1.0 × 10-10
1.0 × 10-8
1.0 × 10-16
1.0 × 10-12
