MCQOPTIONS
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MCQOPTIONS
This section includes 68 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The ability of a catalyst to accelerate the chemical reaction is known as |
| A. | Selectivity |
| B. | Activity |
| C. | Positive catalysis |
| D. | Negative catalysis |
| Answer» C. Positive catalysis | |
| 52. |
Protons increase the rate of hydrolysis of esters. This is an example of |
| A. | A promoter |
| B. | An auto catalyst |
| C. | An acid-base catalyst |
| D. | A hetrogeneous catalyst |
| Answer» D. A hetrogeneous catalyst | |
| 53. |
Which one is an emulsifier ? |
| A. | Soap |
| B. | Water |
| C. | Oil |
| D. | Linseed oil |
| Answer» B. Water | |
| 54. |
Vanishing cream is an example of a |
| A. | Solid emulsion |
| B. | Lyophilic sol |
| C. | Foam |
| D. | True solution |
| Answer» B. Lyophilic sol | |
| 55. |
The detergent action of soap is due to its |
| A. | Emulsifying property |
| B. | Alkalinity |
| C. | Solubility in water |
| D. | Preciptating power |
| Answer» B. Alkalinity | |
| 56. |
Sedimentation potential is the reverse of |
| A. | Dorn Potential |
| B. | Elctro-osmosis |
| C. | Electro-kinetic potential |
| D. | Electrophoresis |
| Answer» E. | |
| 57. |
Which one is an example of Miscelles System here ? |
| A. | Soap + Water |
| B. | Protein + Water |
| C. | Rubber + Benzene |
| D. | All of these |
| Answer» B. Protein + Water | |
| 58. |
Colloidal solution are not purified by |
| A. | Electrodialysis |
| B. | Electrophoresis |
| C. | Ultrafication |
| D. | Dialysis |
| Answer» C. Ultrafication | |
| 59. |
A colloid solution of a liquid, in a solid is termed as |
| A. | Aerosol |
| B. | Gel |
| C. | Emulsion |
| D. | Sol |
| Answer» C. Emulsion | |
| 60. |
Which of the following is not true about physical absorption ? |
| A. | Absorption is spontaneous |
| B. | Absorption on solid is reversible |
| C. | Absorption increases while temperature increases |
| D. | None of these |
| Answer» D. None of these | |
| 61. |
An example of an associated colloid is |
| A. | Vegetable oil |
| B. | Rubber latex |
| C. | Soap solution |
| D. | Milk |
| Answer» D. Milk | |
| 62. |
The process of separating a crystalloid, from a colloid by filtration, is called |
| A. | Emulsification |
| B. | Dialysis |
| C. | Coagulation |
| D. | Peptization |
| Answer» C. Coagulation | |
| 63. |
When river water meets sea water delta formation takes place. It is due to the phenomenon of |
| A. | Dialysis |
| B. | Coagulation |
| C. | Electrophoresis |
| D. | Absorption |
| Answer» C. Electrophoresis | |
| 64. |
A catalyst poison is essntially |
| A. | A inhibitor |
| B. | An auto catalyst |
| C. | A heterogeneous catalyst |
| D. | A homogeneous catalyst |
| Answer» B. An auto catalyst | |
| 65. |
The decomposition of H |
| A. | Negative catalyst |
| B. | Positive catalyst |
| C. | Induced catalyst |
| D. | Auto catalyst |
| Answer» B. Positive catalyst | |
| 66. |
Colloidal medicines are more effective because |
| A. | they are cheap |
| B. | they are easy to prepare |
| C. | the germs move towards them |
| D. | they are easily assimilated and adsorbed |
| Answer» E. | |
| 67. |
Out of the following which one is an example of emulsion ? |
| A. | Soap solution |
| B. | Milk |
| C. | Blood |
| D. | Air |
| Answer» C. Blood | |
| 68. |
The Brownian motion is due to |
| A. | temperature fluctiation within the liquid phase |
| B. | attraction and repulsion between charges on the colloidal particles |
| C. | impact of the molecules of the dispersion medium on the colloidal particles |
| D. | convection currents |
| Answer» D. convection currents | |