Q. In which of the following solutions must combination electrodes be soaked after cleaning?

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Q. Gel filled combination electrodes operate in a wide temperature range.

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Q. In combination electrodes, both the electrodes must be maintained at different temperatures.

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Q. pH meters can be considered as voltage sources with which of the following internal resistances?

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Q. The electrodes used in pH measurement have which of the following internal resistances?

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Q. Which of the following is not a failure in pH meters?

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Q. Which of the following is the simplest of pH meters?

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Q. In which of the following ways can zero drift be reduced in pH meters?

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Q. Which of the following can be used to provide automatic temperature compensation?

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Q. Which of the following is not the characteristic of null-detector type pH meter?

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Q. Which of the following is not the characteristic of direct reading type pH meters?

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Q. Which of the following is not the characteristic of chopper amplifier pH meter?

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Q. In which of the following ways can the disadvantages of chopper amplifier type pH meter be overcome?

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Q. The zero stability of vibrating condenser amplifier type pH meter is much better than a direct coupled amplifier.

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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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