Q51.The coagulating power of electrolytes having ions Na+ , Al3+ and Ba2+ for arsenic sulphide sol increases in the order, (1) Ba2+ < Na+ < Al3+ (2) Al3+ < Na+ < Ba2+ (3) Al3+ < Ba2+ < Na+ (4) Na+ < Ba2+ < Al3+
What This Question Tests
Tests knowledge of the Hardy-Schulze rule for coagulation of colloidal solutions, specifically for a negatively charged sol.
Concepts Tested
📚 NCERT Sections This Tests
2.1 — Arrange The Following Metals In The Order In Which They Displace Each Other
Chemistry Class 11 · Chapter 2
2.1 Arrange the following metals in the order in which they displace each other from the solution of their salts. Al, Cu, Fe, Mg and Zn.
2.2 — Given The Standard Electrode Potentials,
Chemistry Class 11 · Chapter 2
2.2 Given the standard electrode potentials, K+/K = –2.93V, Ag+/Ag = 0.80V, Hg2+/Hg = 0.79V Mg2+/Mg = –2.37 V, Cr3+/Cr = – 0.74V Arrange these metals in their increasing order of reducing power.
5.11 — Draw All The Isomers (Geometrical And Optical) Of:
Chemistry Class 11 · Chapter 5
5.11 Draw all the isomers (geometrical and optical) of: (i) [CoCl2(en)2] + (ii) [Co(NH3)Cl(en)2] 2+ (iii) [Co(NH3)2Cl2(en)]+
📋 Question Details
- Chapter
- Surface Chemistry
- Topic
- Coagulation, Hardy-Schulze rule
- Year
- 2013
- Shift
- 07 Apr
- Q Number
- Q51
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 5: Surface Chemistry
More from this Chapter
Q92.In Langmuir’s model of adsorption of a gas on a solid surface (1) the rate of dissociation of adsorbed molecules (2) the adsorption at a single site on the surface may from the surface does not depend on the surface involve multiple molecules at the same time covered (3) the mass of gas striking a given area of surface is (4) the mass of gas striking a given area of surface is proportional to the pressure of the gas independent of the pressure of the gas
Q60.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 (1) D < A < C < B (2) C < B < D < A (3) A < C < B < D (4) B < D < A < C
Q49.Which of the following statements is incorrect regarding physissorptions ? JEE Main 2009 JEE Main Previous Year Paper (1) It occurs because of vander Waal's forces. (2) More easily liquefiable gases are adsorbed readily. (3) Under high pressure it results into multi (4) Enthalpy of adsorption (ΔHadsorption ) is low and molecular layer on adsorbent surface. positive.
Q52.If x is the mass of the gas adsorbed on mass m of the adsorbent at pressure p, Freundlich adsorption isotherm gives a straight line on plotting (1) x/m vs p (2) x/m vs 1/p (3) log x/m vs log p (4) log x/m vs p