Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

171. Fog is an example of colloidal system of
  • liquid dispersed in gas
  • gas dispersed in gas
  • solid dispersed in gas
  • solid dispersed in liquid
228 Views

172. Milk is a 
  • Fat dispersed in milk
  • Fat dispersed in water
  • Water dispersed in fat
  • Water dispersed in oil
171 Views

173. Smoke is an example of
  • Gas dispersed in liquid
  • Gas dispersed in solid
  • Solid dispersed in gas
  • Solid dispersed in solid
165 Views

174. The extrastability of lyophilic colloids is due to
  • Charge on their particles
  • A layer of medium of dispersion on their particles
  • The smaller size of their particles
  • The larger size of their particles
200 Views

Advertisement
Advertisement

175. Lyophilic sols are more stable than lyophobic sols because
  • The colloidal particles have positive charge
  • The colloidal particles have negative charge
  • The colloidal particles are solvated
  • There are strong electrostatic repulsions between the negatively charged colloidal particles.


C.

The colloidal particles are solvated
805 Views

Advertisement
176. Which one of the following is a hydrophobic sol?
  • Starch solution
  • Gum solution
  • Protein solution
  • Arsenic sulphide solution
171 Views

177. Which one of the following is not a colloid?
  • Milk
  • Blood
  • Ice-cream
  • Urea solution
154 Views

178. When excess of electrolyte is added to a colloid, it
  • coagulates
  • stabilises
  • gets diluted
  • does not change
292 Views

Advertisement
179. Which of the following will have the highest coagulating power for As2S3 colloid?
  • PO43–
  • SO42–
  • Al3+
  • Na+
244 Views

180. Tyndall effect in colloidal solution is due to
  • Scattering of light
  • Reflection of light
  • Absorption of light
  • Presence of electrically charged particles
144 Views

Advertisement