The ionization constant of phenol is 1.0 × 10–10. The concentration of phenolate ion in 0.05 M solution of phenol will be -
1. 4.2 x 10-4 M
2. 3.6 x 10-5 M
3. 7.8 x 10-6 M
4. 2.2 x 10-6 M
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The first ionization constant of H2S is 9.1 × 10–8. The concentration of HS– ion in its 0.1 M solution will be:
1. | 12.3 x 10-7 M | 2. | 11.4 x 10-6 M |
3. | 3.5 x 10-4 M | 4. | 9.54 x 10-5 M |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The ionization constant of acetic acid is 1.74 × 10–5. The pH of acetic acid in its 0.05 M solution will be:
1. | 7.81
|
2. | 3.03
|
3. | 8.54
|
4. | 1.45 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
(a) Human muscle-fluid, pH =6.83
(b) Human stomach fluid, pH = 1.2
(c) Human blood, pH= 7.38
(d) Human saliva, pH =6.4.
Out of the above mentioned biological fluids, the one with the minimum concentration of hydrogen ions is:
1. | Human blood | 2. | Human muscle fluid |
3. | Human stomach fluid | 4. | Human saliva |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The pH values of milk, tomato juice, lemon juice, and egg are 6.8, 4.2, 2.2, and 7.8 respectively.
The corresponding hydrogen ion concentration is maximum in:
1. | Lemon juice
|
2. | Milk
|
3. | Egg white
|
4. | Tomato juice |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The ionization constant of propanoic acid is 1.32 × 10–5. The degree of ionization of 0.05M acid solution will be:
1. = 0.63 x 10-2
2. = 1.63 x 10-4
3. = 1.63 x 10-2
4. = 0.05 x 10-2
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The salt that gives a neutral solution in water is:
1. KBr
2. NH4NO3
3. NaCN
4. Rb2(CO3)
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The ionization constant of benzoic acid is 6.46×10–5 and Ksp for silver benzoate is 2.5×10–13. Silver benzoate is x times more soluble in a buffer of pH 3.19 compared to its solubility in pure water. The value of x will be:
1. 6.8
2. 16.8
3. 33.3
4. 3.3
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The equilibrium constant Kc expression for the above mentioned reaction is:
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The solution that has the lowest pH is:
(assuming 100% dissociation)
1. | 0.003 M HCl | 2. | 0.005 M NaOH |
3. | 0.002 M HBr | 4. | 0.002 M KOH |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.