MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In _____ reactions, molecules absorbing light do not themselves react but induce other molecules to react. |
| A. | Photosensitized |
| B. | Thermal |
| C. | Irreversible |
| D. | Dark |
| Answer» B. Thermal | |
| 2. |
Medicine bottles are often made with darkened glass _______ |
| A. | to prevent the drug from photodegradation |
| B. | to allow the photodegradation of drug |
| C. | to reduce the cost |
| D. | to allow oxidation of drug |
| Answer» B. to allow the photodegradation of drug | |
| 3. |
Vision is initiated by a photochemical reaction of ______ |
| A. | Rhodopsin |
| B. | Hydrogen Chloride |
| C. | Mercapton |
| D. | Enzymes |
| Answer» B. Hydrogen Chloride | |
| 4. |
Mercaptans can be produced by photochemical addition of ______ to alpha olefins. |
| A. | hydrogen sulphide |
| B. | sulphur |
| C. | hydrogen |
| D. | paraffins |
| Answer» B. sulphur | |
| 5. |
Which of the following are the principle laws of photochemistry? |
| A. | Grothus-Draper and Stark-Einstein law |
| B. | Raoult’s and Dalton’s law |
| C. | Raoult’s and Henry’s law |
| D. | Lambert’s and Beer’s law |
| Answer» B. Raoult’s and Dalton’s law | |
| 6. |
Which of the following is an example of photochemical reaction? |
| A. | Photosynthesis |
| B. | Decomposition of ammonia |
| C. | Formation of NaOH |
| D. | Decomposition of HCl |
| Answer» B. Decomposition of ammonia | |
| 7. |
Ozone is formed by ______ dissociation of molecular oxygen into individual oxygen atoms. |
| A. | photochemical |
| B. | thermochemical |
| C. | thermal |
| D. | ionic |
| Answer» B. thermochemical | |
| 8. |
In photochemical reactions, the presence of light is not required for the reaction to take place. |
| A. | true |
| B. | false |
| Answer» C. | |
| 9. |
In photochemical reactions, absorption of _____ radiations takes place. |
| A. | ultraviolet and visible |
| B. | radio |
| C. | only visible |
| D. | visible and x-rays |
| Answer» B. radio | |
| 10. |
The reactions which are caused by heat and in absence of light is called _____ |
| A. | Photochemical reactions |
| B. | Dark reactions |
| C. | Reversible reaction |
| D. | Reversible photochemical reaction |
| Answer» C. Reversible reaction | |