MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Analytical Instrumentation knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The diagram of Electrochemical cell used for the detection of hydrogen sulphide is given below. Identify the unmarked component. |
| A. | Filter |
| B. | Gas permeable membrane |
| C. | Elastic layer |
| D. | Electrolyte |
| Answer» C. Elastic layer | |
| 2. |
Which of the following is not a component of solid state sensor used for detection of hydrogen sulphide? |
| A. | Heater |
| B. | Thermistor |
| C. | Semiconductor film |
| D. | Photo detector |
| Answer» E. | |
| 3. |
In the gold film sensor, the change in resistance is proportional to the concentration of H2S. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In solid state sensor, when heated to 150o to 300o which of the following occurs? |
| A. | Resistance decreases with increase in H2S concentration |
| B. | Resistance increases with H2S concentration |
| C. | No change in resistance occurs |
| D. | Sensor does not respond in this temperature range |
| Answer» B. Resistance increases with H2S concentration | |
| 5. |
Which of the following is not an advantage of solid state sensor used for analysis of H2S? |
| A. | No sampling system |
| B. | It can be used in conditions involving vibration |
| C. | It can be used in corrosive atmosphere |
| D. | No interference from background gases |
| Answer» E. | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_NOT_A_COMPONENT_OF_SOLID_STATE_SENSOR_USED_FOR_DETECTION_OF_HYDROGEN_SULPHIDE??$ |
| A. | Heater |
| B. | Thermistor |
| C. | Semiconductor film |
| D. | Photo detector |
| Answer» E. | |
| 7. |
Which of the following occurs in Electrochemical cells used for the detection of hydrogen sulphide? |
| A. | Change in resistance |
| B. | Redox reaction |
| C. | Oxidation-reduction reaction |
| D. | Change in colour |
| Answer» D. Change in colour | |
| 8. |
In the gold film sensor, the change in resistance is proportional to the concentration of H2S. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
In solid state sensor, when heated to 150o to 300o which of the following occurs? |
| A. | Resistance decreases with increase in H<sub>2</sub>S concentration |
| B. | Resistance increases with H<sub>2</sub>S concentration |
| C. | No change in resistance occurs |
| D. | Sensor does not respond in this temperature range |
| Answer» B. Resistance increases with H<sub>2</sub>S concentration | |
| 10. |
Which of the following methods is not used for detection of hydrogen sulphide? |
| A. | Lead acetate tape staining method |
| B. | Solid state sensor |
| C. | Chemiluminescence method |
| D. | Electrochemical cells |
| Answer» D. Electrochemical cells | |
| 11. |
Which is the compound that forms the stain in Lead Acetate Tape Staining method used for the analysis of Hydrogen Sulphide and what is the colour of the stain? |
| A. | Lead Sulphide, red colour |
| B. | Lead Sulphide, brown colour |
| C. | Hydrogen acetate, white colour |
| D. | Hydrogen acetate, green colour |
| Answer» C. Hydrogen acetate, white colour | |
| 12. |
Which of the following is not an advantage of solid state sensor used for analysis of H2S? |
| A. | No sampling system |
| B. | It can be used in conditions involving vibration |
| C. | It can be used in corrosive atmosphere |
| D. | No interference from background gases |
| Answer» E. | |
| 13. |
Which of the following methods are mainly used in combustible gas detection equipment? |
| A. | Lead acetate tape staining method |
| B. | Solid state sensor |
| C. | Gold film sensor |
| D. | Electrochemical cells |
| Answer» C. Gold film sensor | |
| 14. |
Which of the following is not an advantage of electrochemical cells used for analysis of H2S? |
| A. | Portable battery operated instrument |
| B. | Pocket sized instrument |
| C. | No pumps are needed |
| D. | No interference from background gases |
| Answer» E. | |