The oxoacid that has the highest Ka value is: t
1 HClO3
2 HBrO3
3 HlO3
4 All have equal Ka
For the equilibrium, at 300 K. The pressure at which 50% of PQ is dissociated is numerically equal to
1. 3
2. 4
3.
4. Can't be predicted
The number of moles of required to a 3.0 liter flask to obtain of concentration 0.15 M is
1. 1.5 mole
2. 2.1 mole
3. 6.0 mole
4. 0.45 mole
For the following reaction,
H
The effect on the state of equilibrium on doubling the volume of the system will be:
1. | Shift to the reactant side | 2. | Shift to the product side |
3. | No effect on the state of equilibrium | 4. | Liquefaction of HI |
Which of the following cannot act as a buffer?
1. NaH2PO4 + H3PO4
2. NH4OH + NH4CI
3. NaOH + CH3COONa
4. Both (1) & (3)
If solubility product of Ca, the pH at which precipitate from a solution containing decimolar concentration of is
1. <5
2. 9<pH<5
3. >9
4. 9<pH>7
For the reaction,
choose the correct representation:
1.
2. Kc = [H2O]2
3.
4. All of the above
The solubility of PbCI2 in water is 0.01 M at 25 °C. The maximum concentration of Pb2+ in 0.1 M NaCI will be:
1. 2×10-3 M
2. 1×10-4 M
3. 1.6×10-2 M
4. 4×10-4 M
If the pH of 0.1 M NaCN solution is 11, then the percentage hydrolysis will be:
1. 0.1%
2. 1%
3. 0.01%
4. 10%
How much water should be added to 400 mL of HCI solution in order to raise the pH by one unit?
1. | 360 mL | 2. | 1000 mL |
3. | 600 mL | 4. | 3600 mL |