In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption $\left(\frac{x}{m}\right)$ is directly proportional to P^x . The value of x is
1. zero
2. $\frac{1}{n}$
3. 1
4. $\infty$

In Freundlich adsorption isotherm, slope of AB line is :

1. log n with (n > 1)

2. n with (n, 0.1 to 0.5)

3. $\begin{array}{l}\log \frac{1}{\mathrm{n}}\text{\hspace{0.17em}with\hspace{0.17em}}(\mathrm{n}<1)\\ \end{array}$

4. $\frac{1}{\mathrm{n}}\text{\hspace{0.17em}with\hspace{0.17em}}\left(\frac{1}{\mathrm{n}}=0\text{\hspace{0.17em}to\hspace{0.17em}}1\right)$

The nature of a charge on resulting colloidal particles when FeCl₃ is added to an excess of hot water is:

Among the following, the method used for the preparation of colloids is-

1. Ostwald Process

2. Van Arkel Method

3. Bredig's Arc Method

4. Mond Process

Tyndall effect is observed when-
1.  The diameter of dispersed particles is similar to the wavelength of light used
2.  The diameter of dispersed particles is much smaller than the wavelength of light used
3.  The refractive index of dispersed phase is greater than that of the dispersion medium
4.  The diameter of dispersed particles is much larger than the wavelength of light used

Kraft temperature is the temperature:

For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and log p (x-axis) gives a straight line. The intercept and slope for the line is 0.4771 and 2, respectively. The mass of gas, adsorbed per gram of adsorbent if the initial pressure is 0.04 atm, is  A$\times {10}^{-4}\mathrm{g}$. The value of A is-  (log 3=0.4771)

1. 48 
2. 0.48
3. 4.8 
4. 480

Peptization is a: