Short Answer TypeCO(g) and H2 (g) react to give different products in the presence of different catalysts. Which ability of the catalyst is shown by these reactions?
What happens when
A freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
Multiple Choice QuestionsFor a linear plot of log (x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct? (k and n are constants)
1/n appears as the intercept.
Only 1/n appears as the slope.
log (1/n) appears as the intercept.
log (1/n) appears as the intercept.
The coagulating power of electrolytes having ions Na+, Al3+ and Ba2+ for arsenic sulphide sol increases in the order:
Al3+<Ba2+<Na+
Na+<Ba2+<Al3+
Ba2+< Na2+<Al3+
Ba2+< Na2+<Al3+
The Tyndall effect is observed only when following conditions are satisfied:-
(a) The diameter of the dispersed particles is much smaller than the wavelength of the light used.
(b) The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
(c) The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
(d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
(a) and (d)
(b) and (d)
(a) and (c)
(a) and (c)
Which of the following statements is incorrect regarding physissorptions?
It occurs because of vander Waal’s forces.
More easily liquefiable gases are adsorbed readily.
Under high pressure, it results into multimolecular layer on the adsorbent surface.
Under high pressure, it results into multimolecular layer on the adsorbent surface.
Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is
D < A < C < B
C < B < D < A
A < C < B < D
A < C < B < D
