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.
| 1. |
In acid-base catalysis, the real catalyst is |
| A. | Acid |
| B. | Base |
| C. | Acid and base |
| D. | H |
| E. | ions |
| Answer» E. ions | |
| 2. |
The decomposition of H2O2 is retarded by phosphoric acid. Thus phosphoric acid acts as |
| A. | Negative catalyst |
| B. | Positive catalyst |
| C. | Induced catalyst |
| D. | Auto catalyst |
| Answer» B. Positive catalyst | |
| 3. |
The catalysis used in Zeigler process for polyethylene manufacture |
| A. | Consists of aluminium triethyl and titanium tetrachoride |
| B. | Is vanadium pentoxide |
| C. | Consists of aluminium chloride and titanium dioxide |
| D. | Is finely divided nickel |
| Answer» B. Is vanadium pentoxide | |
| 4. |
Which one is not a colloidal solution ? |
| A. | Smoke |
| B. | Air |
| C. | Ink |
| D. | Blood |
| Answer» C. Ink | |
| 5. |
On which of the following factors of gas the extent of absorption of a gas on a solid depends upon ? |
| A. | Temperature |
| B. | Nature |
| C. | Pressure |
| D. | (a), (b) & (c) All |
| Answer» E. | |
| 6. |
The enzyme ptyalin used for digestion of food is present in |
| A. | Saliva |
| B. | Blood |
| C. | Intestine |
| D. | Adneral gland |
| Answer» B. Blood | |
| 7. |
Reverse of swelling of gel is known as |
| A. | Syneresis |
| B. | Thizotropy |
| C. | Sorption |
| D. | None of these |
| Answer» B. Thizotropy | |
| 8. |
Shape selective catalyst are known by this name because |
| A. | of the shape ofcatalyst |
| B. | of specificity of catalyst |
| C. | size of pores of the catalyst can trap only selective species |
| D. | none of the above |
| Answer» D. none of the above | |
| 9. |
Which of the following dose not contain a hydrophobic structure ? |
| A. | Linseed oil |
| B. | Lanolin |
| C. | Glycogen |
| D. | Rubber |
| Answer» E. | |
| 10. |
In case of auto catalysis |
| A. | Reactant catalysis |
| B. | Product catalysis |
| C. | Solvent catalysis |
| D. | Heat produced in the reaction catalysis |
| Answer» B. Product catalysis | |
| 11. |
A biological catalysis is essentially |
| A. | A carbohydrate |
| B. | An enzyme |
| C. | A nitrogen molecule |
| D. | An amino acid |
| Answer» C. A nitrogen molecule | |
| 12. |
The reactions in zeolite catalysis depend upon |
| A. | Apertues |
| B. | Size of cavites |
| C. | Pores |
| D. | All of these |
| Answer» E. | |
| 13. |
The process of separting of cream from milk is called |
| A. | Emulsification |
| B. | Demulsification |
| C. | Emulsions |
| D. | Electro-osmosis |
| Answer» C. Emulsions | |
| 14. |
Which of the following is not a colloid ? |
| A. | Chlorophyll |
| B. | Smoke |
| C. | Ruby glass |
| D. | Milk |
| Answer» B. Smoke | |
| 15. |
Whipped cream is an example of |
| A. | Liquid-gas |
| B. | Liquid-liquid |
| C. | Liquid-solid |
| D. | Solid-liquid |
| Answer» B. Liquid-liquid | |
| 16. |
Gold number is the index for |
| A. | Protective colloid |
| B. | Metallic gold |
| C. | Troplated gold |
| D. | Purity of gold |
| Answer» B. Metallic gold | |
| 17. |
Sulphur sol contains |
| A. | discrete sulphur atoms |
| B. | discrete sulphur molecules |
| C. | large aggregates of sulphur molecules |
| D. | water disperesed in solid sulphur |
| Answer» D. water disperesed in solid sulphur | |
| 18. |
The colourfullness of the sky is due to which of the following reason ? |
| A. | wave length of scattered light |
| B. | transmission of light |
| C. | absorption of light by atmospheric gases |
| D. | None of these |
| Answer» B. transmission of light | |
| 19. |
If the dispered phase is a liquid and the dispersion medium is solid, the colloid is known as |
| A. | Foam |
| B. | Sol |
| C. | Emulsion |
| D. | Gel |
| Answer» E. | |
| 20. |
Butter is a colloid formed when |
| A. | fat is dispersed in water |
| B. | fat globules are dispersed in water |
| C. | water is dispersed in fat |
| D. | suspension of casein in water |
| Answer» D. suspension of casein in water | |
| 21. |
The extent of adsorption of a gas, on a solid depends upon |
| A. | nature of gas |
| B. | temperature of gas |
| C. | pressure of gas |
| D. | all of these |
| Answer» E. | |
| 22. |
Which factor effects adsorption ? |
| A. | Temperature |
| B. | Surface area |
| C. | Pressure |
| D. | All of these |
| Answer» E. | |
| 23. |
Adsorption due to strong chemical forces is called |
| A. | Physiosorption |
| B. | Chemisorption |
| C. | Reversible adsorption |
| D. | Both (a) and (c) |
| Answer» C. Reversible adsorption | |
| 24. |
In which of the following Tyndall effect is not observed ? |
| A. | Gold sol |
| B. | Sugar solution |
| C. | Emulsions |
| D. | Suspension |
| Answer» C. Emulsions | |
| 25. |
The bleeding of a wound is stopped by the application of ferric chloride because |
| A. | blood stars flowing in the opposite direction |
| B. | ferric chloride seals the blood vessels |
| C. | blood reacts and a solid is formed which seals the blood vessels |
| D. | blood is coagulated and the blood vessels are sealed |
| Answer» E. | |
| 26. |
Medicines are more effective, if they are used in |
| A. | Solution state |
| B. | Gaseous state |
| C. | Colloidal state |
| D. | Solid state |
| Answer» D. Solid state | |
| 27. |
Which of the following shows Tyndall effect ? |
| A. | Emulsion |
| B. | Gel |
| C. | Sol |
| D. | Solution |
| Answer» D. Solution | |
| 28. |
The sky looks blue due to |
| A. | Dispersion effect |
| B. | Scattering |
| C. | Reflection |
| D. | Transmission |
| Answer» C. Reflection | |
| 29. |
The adsorption of hydrogen by palladium is called |
| A. | Hydrogenation |
| B. | Reduction |
| C. | Hydration |
| D. | Occlusion |
| Answer» E. | |
| 30. |
How many layers are adsorbed in chemical adsorption ? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Infinite |
| Answer» C. Two | |
| 31. |
The solution of rubber is an example of |
| A. | Lyophobic colloid |
| B. | Mutimolecular colloid |
| C. | Associated colloid |
| D. | Macromolecular colloid |
| Answer» E. | |
| 32. |
Smoke is a colloidal dispersion of a |
| A. | solid in a gas |
| B. | liquid in a gas |
| C. | gas in a solid |
| D. | gas in a gas |
| Answer» B. liquid in a gas | |
| 33. |
The movement of colloidal particle under the influence of electric field is called |
| A. | Electro-dialysis |
| B. | Electro-osmosis |
| C. | Electrolysis |
| D. | Electrophoresis |
| Answer» E. | |
| 34. |
When a strong beam of light is passed through a colloidal solution, the light is |
| A. | Reflected |
| B. | Scattered |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» C. Both (a) and (b) | |
| 35. |
The formation of colloid from suspension is |
| A. | Peptisation |
| B. | condensation |
| C. | Sedimentation |
| D. | None of these |
| Answer» B. condensation | |
| 36. |
Alums help is purifycing of water through which process ? |
| A. | Making mud water soluble |
| B. | Sulphate mixed with dirt and removes it |
| C. | Coagulating the mud particles |
| D. | None of these |
| Answer» D. None of these | |
| 37. |
Which of the following is a homogeneous system ? |
| A. | Muddy water |
| B. | Bread |
| C. | Concrete |
| D. | Solution of sugar in water |
| Answer» E. | |
| 38. |
Artificial rain is caused by spraying |
| A. | Neutral charged colloidal dust over a cloud |
| B. | Similar charged colloidal dust over a cloud |
| C. | Both (a) and (b) |
| D. | Opposite charged colloidal dust over a cloud |
| Answer» E. | |
| 39. |
Which of the following colloidal solution is used in photography ? |
| A. | Colloidal silver bromite |
| B. | Colloidal gold |
| C. | Colloidal silver |
| D. | Colloidal sulphur |
| Answer» B. Colloidal gold | |
| 40. |
Which of the following colloidal solution is commonly used as germ killer ? |
| A. | Colloidal sulphur |
| B. | Colloidal gold |
| C. | Colloidal silver |
| D. | colloidal antimony |
| Answer» B. Colloidal gold | |
| 41. |
Colloidal solution commonly used in the treatment of eye disease is |
| A. | Colloidal silver |
| B. | Colloidal gold |
| C. | Colloidal antimony |
| D. | Colloidal sulphur |
| Answer» D. Colloidal sulphur | |
| 42. |
When a few typical solutes are separated by a particular selective membrane, such as protein particles from blood corpuscles, the process in called |
| A. | Exosmosis |
| B. | Dialysis |
| C. | Transpiration |
| D. | Endosmoisis |
| Answer» C. Transpiration | |
| 43. |
The separation of colloidal particles from those od molecular dimensions is called |
| A. | Dialysis |
| B. | Photolysis |
| C. | Peptization |
| D. | Pyrolysis |
| Answer» B. Photolysis | |
| 44. |
Dialysis can separate which of the following in addition to the glucose from human blood |
| A. | Fructose |
| B. | Starch |
| C. | Protein |
| D. | Sucrose |
| Answer» D. Sucrose | |
| 45. |
Difference between crystalloids and colloids is of |
| A. | Solubility |
| B. | Reactivity |
| C. | Size of particles |
| D. | None of these |
| Answer» D. None of these | |
| 46. |
Which of the following colloids are solvent loving colloids ? |
| A. | Lyophilic |
| B. | Lyophobic |
| C. | Hydrophilic |
| D. | None of these |
| Answer» B. Lyophobic | |
| 47. |
Soap helps in cleaning the clothes because |
| A. | it adsorbs dust |
| B. | it reduces the surface of solution |
| C. | it absorbs dust |
| D. | all of the above |
| Answer» C. it absorbs dust | |
| 48. |
Which one of the following elements is used as common catalyst ? |
| A. | B |
| B. | Ge |
| C. | Ni |
| D. | Ga |
| Answer» D. Ga | |
| 49. |
Eosin used to detect the end point of precipitation titration by adsorption is called |
| A. | Absorption indicator |
| B. | Adsorption indicator |
| C. | Normal indicator |
| D. | Chemical indicator |
| Answer» C. Normal indicator | |
| 50. |
Which of the following colloids are solvent hating colloids ? |
| A. | Lyophilic |
| B. | Lyophobic |
| C. | Hydrophilic |
| D. | None of these |
| Answer» C. Hydrophilic | |