Water vapours can be both adsorbed and absorbed by respectively ?

1. Silica gel and ${\mathrm{CaCl}}_2$

2. Chalk and ${\mathrm{CaCl}}_2$

3. ${\mathrm{CaCl}}_2$ and Silica gel

4. ${\mathrm{CaCl}}_2$ and Chalk

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

$1$ $\mathrm{mol}$ of $\left[\mathrm{AgI}\right]{\mathrm{I}}^{-}$ 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.

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

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.

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?

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