When 0.1 mole of CH3NH2 (ionization constant ) is mixed with 0.08 mol HCl and the volume is made up of 1 litre. The [H+] of resulting solution is -
(log 4 = 0.60)
1.
2.
3.
4.
The solution with pH value close to 1.0 among the following is:
1. | 100 ml of (M/10) HCl + 100 ml of (M/10) NaOH |
2. | 55 ml of (M/10) HCl + 45 ml of (M/10) NaOH |
3. | 10 ml of (M/10) HCl + 90 ml of (M/10) NaOH |
4. | 85 ml of (M/10) HCl + 15 ml of (M/10) NaOH |
If
Then for
Equilibrium constant will be
1.
2.
2.
4.
There sparingly soluble saltrs A2X, AX and AX3 have the same solubility product.Their solubilities will be in the order
1. AX3>AX>A2X
2. AX3 < A2X>AX
3. AX>AX3>A2X
4. AX>A2X>AX3
Which of the following solution(s) have pH between 6 and 7?
I.
II.
III.
IV.
1. I, II
2. II, III
3. III, IV
4. II, III, IV
What is the pH value at which Mg(OH)2 begins to precipitate from a solution containing 0.10 M Mg+2 ion? Ksp of Mg(OH)2 is
1. 3
2. 6
3. 9
4. 11
50 litres of 0.1 M HCl are mixed with 50 litres of 0.2 M NaOH. The pH of the resulting solution is
1. 12.70
2. 12.34
3. 8.7
4. 4.2
The pH of a 0.05 M aqueous solution of diethylamine is 12. Its Kb value will be:
1.
2.
3.
4.
Ka for HCN is at . For maintaining a constant pH of 9, the volume of 5 M KCN solution required to be added to 10 mL of 2 M HCN solution is-
1. 2 mL
2. 3 mL
3. 4.2 mL
4. 5.6 mL
The approximate pH of a solution formed by mixing equal volumes of solutions of 0.1 M sodium propionate and 0.1 M propanoic acid (the dissociation constant of propanoic acid is ) will be
1. 2.45
2. 4.89
3. 5.98
4. 6.89