Questions and answers for exam Preparation

MCQs

Total Questions : 151 | Page 9 of 16 pages

Question 81. The pH response of glass electrode is limited entirely to the area of the special glass membrane bulb.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 82. Which of the following is not the advantage of glass electrodes?

It gives accurate results for high as well as low pH values
It is simple to operate
It has no salt error
Modern electrodes can withstand severe treatment

Discuss Question

Answer: Option A. -> It gives accurate results for high as well as low pH values
Answer: (a).It gives accurate results for high as well as low pH values

Question 83. Which of the following is known as calomel?

Silver chloride
Mercury chloride
Potassium chloride
Mercury sulphate

Discuss Question

Answer: Option B. -> Mercury chloride
Answer: (b).Mercury chloride

Question 84. Which of the following cannot be used as secondary reference electrode?

Calomel electrode
Silver-silver chloride electrode
Mercury-mercury sulphate electrode
Glass electrode

Discuss Question

Answer: Option D. -> Glass electrode
Answer: (d).Glass electrode

Question 85. Which of the following is not the disadvantage of glass electrodes?

Poor readings are obtained in buffered or unbuffered solutions
The electrode must be washed thoroughly with distilled water to obtain proper results
Materials suspended on glass should be wiped out neatly to obtain proper results
It is affected by oxidation reduction potentials in the solution

Discuss Question

Answer: Option D. -> It is affected by oxidation reduction potentials in the solution
Answer: (d).It is affected by oxidation reduction potentials in the solution

Question 86. The calomel electrodes are classified based on which of the following?

Materials used in the electrode
Amount of mercury present
Concentration of Kcl
Purity of mercury

Discuss Question

Answer: Option C. -> Concentration of Kcl
Answer: (c).Concentration of Kcl

Question 87. When the calomel electrode acts as the cathode which of the following does not occur?

Mercury ions are discharged at the electrode
More calomel passes into the solution
There is a decrease in the concentration of chloride ions
There is an increase in the concentration of chloride ions

Discuss Question

Answer: Option D. -> There is an increase in the concentration of chloride ions
Answer: (d).There is an increase in the concentration of chloride ions

Question 88. Which of the following is not the characteristics of a calomel electrode?