Q. In vibrating condenser amplifier type pH meter, to maintain good performance which of the following has to be done?

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Q. If an instrument fails to balance at zero, it is most likely that the electrodes are defective.

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Q. Which of the following is not the characteristic of ion selective electrodes?

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Q. In glass membrane electrode, the glass containing 11% Na₂O, 18% Al₂O₃, 71% SiO₂ is highly sensitive to which of the following ions?

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Q. In liquid membrane electrode, the liquid ion exchanger is held in a porous disc of _____________

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Q. In recent liquid membrane electrodes, the porous liquid membrane is replaced with which of the following?

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Q. Which of the following is used in potassium electrode in liquid membrane electrodes?

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Q. In solid state membranes, the body of the electrodes are made of which of the following?

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Q. Which of the following is not the characteristic of ion selective electrodes?

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Q. Ion selective electrode are unaffected by colour or turbidity of the solution.

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Q. Which of the following is not a problem of ion selective electrodes?

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Q. Which of the following is the effective concentration measured at the electrode head?

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Q. The value of activity coefficient is always in which of the following ranges?

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Q. Which of the following specifies the relation between ionic strength and activity coefficient?

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Q. The difference between measured activity and actual concentration becomes higher at higher concentration. Is this statement true or false?

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Q. Ion selective electrodes have ________ linear range and _________ detection limit than the pH electrode.

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Q. In Ammonia electrode, diffusion of dissolved ammonia occurs through the membrane until which of the following conditions occur?

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Q. When electrode potential response is plotted as a function of ammonia concentration on a semi-log graph, the graph obtained will be ____________

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Q. How can samples above 1M in ammonia concentration be measured using ammonia electrode?

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Q. The dilution of solution must not reduce the level of ammonia below _________

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