The salt solution that is basic in nature is:
1. Ammonium chloride.
2. Ammonium sulphate.
3. Ammonium nitrate.
4. Sodium acetate.
At 25 ºC, the dissociation constant of a base, BOH, is 1.0 × 10–12. The concentration of hydroxyl ions in 0.01M aqueous solution of the base would be:
1. | 1.0 × 10–6 mole L–1 | 2. | 1.0 × 10–7 mole L–1 |
3. | 2.0 × 10–6 mole L–1 | 4. | 1.0 × 10–5 mole L–1 |
The compound with the highest pH among the following is:
1. CH3COOK
2. Na2CO3
3. NH4Cl
4. NaNO3
1. | Equilibrium is possible only in a closed system at a given temperature. |
2. | All measurable properties of the system remain constant. |
3. | All the physical processes stop at equilibrium. |
4. | The opposing processes occur at the same rate and there is a dynamic but stable condition. |
The pKb of dimethylamine and pka of acetic acid are 3.27 and 4.77 respectively at T (K).
The correct option for the pH of dimethylammonium acetate solution is:
1. 7.75
2. 6.25
3. 8.50
4. 5.50
For the equilibrium,
2NOCl(g) 2NO(g) + Cl2(g)
the value of the equilibrium constant, Kc is 3.75 × 10–6 at 1069 K.
The value of Kp for the reaction at this temperature is:
1. 0.048
2. 0.67
3. 0.29
4. 0.033
Hydrolysis of sucrose gives,
Sucrose + H2O Glucose + Fructose
The equilibrium constant Kc for the reaction is 2 ×1013 at 300K. The value of ∆G⊖ at 300K is:
1. – 5.64 ×104 J mol–1
2. – 7.64 ×104 J mol–1
3. – 6.64 ×104 J mol–1
4. – 8.64 ×104 J mol–1
The ionization constant of the hypochlorous acid is 2.5 × 10–5. The concentration of hypochlorous acid 0.08 M. The percent dissociation of HOCl is:
1. 2.56 %
2. 1.21 %
3. 1.76 %
4. 2.21 %
The solubility of A2X3 in pure water, assuming that neither kind of ion reacts with water is:
(solubility product of A2X3, Ksp = 1.1 × 10–23)
1. | 5.0 × 10–5 mol/L. | 2. | 1.0 × 10–5 mol/L |
3. | 1.0 × 10–4 mol/L | 4. | 5.0 × 10–4 mol/L. |
For the given reaction: H2NCOONH4 (s) \( \rightleftharpoons\) 2NH3 (g) + CO2 (g),
total pressure at equilibrium is found to be 18 atmospheres. The value of Kp for the above equilibrium will be
1. 72 atm3
2. 144 atm3
3. 432 atm3
4. 864 atm3