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Analytical Instrumentation MCQ Question Set 8

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1. In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?




2. Biosensors measure glucose concentrations between which of the following ranges?




3. Transducers employed in the bulk of enzyme electrodes use which of the following principles?




4. Which of these biosensors use the principle of heat released or absorbed by a reaction?




5. Which of the following biosensors use the movement of electrons produced during redox reactions?




6. Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.




7. In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.




8. For constructing the glucose sensor, which of the following is used as a gel?




9. Which of the following transducers must be used for dissolved oxygen analyser?




10. How does solubility of oxygen in water change with respect to temperature?




11. The water to be analysed flows into the condenser through which of the following components?




12. Which of the following is the function of the throttling device?




13. Which of the following section plays a major role in maintaining the accuracy of the dissolved oxygen analyser?




14. Which of the following bridges are used in dissolved oxygen analyser?




15. In dissolved oxygen analyser, the electrometer consists of which of the following solutions?




16. The dissolved oxygen analyser is based on which of the following meters?




17. Oxygen content can be controlled by adding which of the following materials with water?




18. In dissolved oxygen analyser, normally more than one condenser is used.




19. Normally, electrodes measure which of the following parameters?




20. Which of the following represent the concentration of a solution?




21. Sodium selective electrode provides a good response in measurement when the pH is above which of the following values?




22. Which of the following are used to free bound ions or liberate bound ions?




23. In which part of the apparatus is the reference and ion selective electrodes placed?




24. The output of the electrode in sodium analyser is proportional to which of the following parameters?




25. Cleaning process gives accuracy and long life.




26. Presence of sodium sulphate in water causes corrosion in boilers.




27. Which of the following principles are used in silica analyser?




28. Which of the following is not added to the sample during analysis during silica analysis?




29. Which of the following detectors are used in silica analyser?




30. The output from both the detectors is given to which of the following devices?




31. If the differential amplifier gives zero as output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?




32. If the differential amplifier gives a positive output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?




33. If the differential amplifier gives a negative output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?




34. Which of the following statements are true?




35. How will the photodetector output be if silica content is high in a solution?




36. What will be the final colour of the solution obtained during silica analysis?




37. During the first sequence of the process, sample is added at the last.




38. Blank use compensates for the effect of temperature variation.




39. Which of the following are highly effective in producing ion pairs when they pass through the matter?




40. Which of the following can liberate photo electrons when they fall on certain metals?




41. Which of these particles are highly penetrating?




42. Alpha emission is characteristic of heavier radioactive elements such as thorium, uranium, etc.




43. Which of the following is not a mode by which beta particles lose energy on interaction with matter?




44. The stability of the nucleus can be predicted by which of the following?




45. Which of the following is true about radiochemical methods?




46. Which of the following formulae gives the expression for half-life of a radioactive isotope when ‘λ’ is the decay constant?




47. Which of the following emissions have low ionizing power?




48. Which of the following effect occurs when a gamma ray and an electron make an elastic collision?




49. Which of the following effects transfers all the energy of the gamma ray to an electron in the inner orbit of the atom of the absorber?




50. The basic unit used to describe the energy of a radiation particle is curie.