Questions and answers for exam Preparation

MCQs

Total Questions : 151 | Page 10 of 16 pages

Question 91. Which of the following is not the characteristics of silver/silver chloride electrode?

These electrodes have good electrical and chemical stability
It can be used in temperatures greater than 600°C
It can be used in places or solutions that have strong reducing agents
It should not be used in solutions that contain proteins, sulphide or bromide

Discuss Question

Answer: Option C. -> It can be used in places or solutions that have strong reducing agents
Answer: (c).It can be used in places or solutions that have strong reducing agents

Question 92. LiCl salt bridge is more suitable in organic solvents than KCl.

True
False
May be True or False
Can't say

Discuss Question

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

Question 93. Which of the following salt bridge solutions must be used for silver/silver chloride electrode?

Saturated KCl
Saturated K₂SO₄
Saturated LiCl
Saturated KNO₃

Discuss Question

Answer: Option A. -> Saturated KCl
Answer: (a).Saturated KCl

Question 94. While using reference electrodes, the internal liquid level should always be kept above that of the sample solution.

True
False
May be True or False
Can't say

Discuss Question

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

Question 95. In combination electrode, which of the following electrodes are built together?

Primary electrode, secondary reference electrode
Primary reference electrode, glass electrode
Glass electrode, secondary reference electrode
Glass electrode with another glass electrode

Discuss Question

Answer: Option C. -> Glass electrode, secondary reference electrode
Answer: (c).Glass electrode, secondary reference electrode

Question 96. Which of the following can be used to provide automatic temperature compensation?

Proper insulation
Calibration for different temperatures
Thermistor
Thermometer

Discuss Question

Answer: Option C. -> Thermistor
Answer: (c).Thermistor

Question 97. Which of the following is not the characteristic of direct reading type pH meters?

Simple operation
Quick to use
Continuous indication output
It requires balancing process

Discuss Question

Answer: Option D. -> It requires balancing process
Answer: (d).It requires balancing process

Question 98. Which of the following is not the characteristic of null-detector type pH meter?

It can be battery operated
It has less accuracy
It is easy to maintain
Its electronic circuits are simple

Discuss Question

Answer: Option B. -> It has less accuracy
Answer: (b).It has less accuracy

Question 99. In which of the following ways can the disadvantages of chopper amplifier type pH meter be overcome?

Using zero corrected DC amplifier
Using modern design
Using digital design
Using vibrating condenser

Discuss Question

Answer: Option D. -> Using vibrating condenser
Answer: (d).Using vibrating condenser

Question 100. Which of the following is not the characteristic of chopper amplifier pH meter?

Direct voltage from the electrodes is chopped at the main frequency
Using choppers for high-input resistance gives rise to spikes of waveforms at the output
It leads to stability in DC output of phase-sensitive rectifier
Magnitude of surge increases in the glass electrode output

Discuss Question

Answer: Option C. -> It leads to stability in DC output of phase-sensitive rectifier
Answer: (c).It leads to stability in DC output of phase-sensitive rectifier