In an adsorption experiment, a graph between log(x/m) versus log P was found to be linear with a slope of 45. The intercept on the y-axis was found to be 0.3. What will be the value of x/m at a pressure of 3 atm for the Freundlich adsorption isotherm when 1/n remains constant?
[Antilog 0.3 = 2]
1. 2
2. 4
3. 6
4. 5
Water vapours can be both adsorbed and absorbed by respectively ?
1. Silica gel and
2. Chalk and
3. and Silica gel
4. and Chalk
The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below
I. (NaCl) = 52, II. (BeCl2) = 0.69, III. (MgSO4) = 0.22
What is the correct order of their coagulating power?
1. I > II > III
2. II > I >III
3. III > II > I
4. III > I >II
1. The magnitude of the charge on the ion alone
2. Size of the ion alone
3. Both magnitude and sign of the charge on the ion.
4. The sign of the charge on the ion alone.
The characteristics associated with adsorption are:
1. ∆G, ∆H, and ∆S are all negative.
2. ∆G and ∆H are negative, but ∆S is positive.
3. ∆G and ∆S are negative, but ∆H is positive.
4. ∆G is negative, but ∆H and ∆S are positive.
of can be coagulated by -
1. 1 mol of Pb(NO3)2
2. \(\frac{1}{2}\) mol of Pb(NO3)2
3. \(\frac{2}{3}\) mol of Pb(NO3)2
4. None of the above.
In the Freundlich adsorption isotherm, the value of 1/n is:
1. Between 0 and 1 in all cases.
2. Between 2 and 4 in all cases.
3. 1 in the case of physical adsorption.
4. 1 in the case of chemisorption.
Which one of the following statements about enzyme catalysis is incorrect?
1. | Enzymes are mostly proteinous in nature. |
2. | Enzyme action is specific. |
3. | Enzymes are denaturized by ultraviolet rays at high temperatures. |
4. | Enzymes are least reactive at an optimum temperature. |
Which mixture of the solutions will lead to the formation of a negatively charged colloidal [AgI]I- sol?
1. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI
2. 50 mL of 1 M AgNO3 + 50 mL of 0.5 M KI
3. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI
4. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI