Questions and answers for exam Preparation

MCQs

Total Questions : 151 | Page 7 of 16 pages

Question 61. The biocatalytic membrane is attached to the glass electrode using which of the following materials?

Nylon mesh
Teflon
Silicon rubber
Polythene

Discuss Question

Answer: Option A. -> Nylon mesh
Answer: (a).Nylon mesh

Question 62. The response time of the biocatalytic electrode is a function of the thickness of the enzyme layer.

True
False
May be True or False
Can't say

Discuss Question

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

Question 63. In carbon dioxide electrode, the membrane separates which of the following?

Sodium carbonate, magnesium chloride
Magnesium hydrogen carbonate, sodium chloride
Sodium hydrogen carbonate, sodium chloride
Magnesium carbonate, magnesium chloride

Discuss Question

Answer: Option B. -> Magnesium hydrogen carbonate, sodium chloride
Answer: (b).Magnesium hydrogen carbonate, sodium chloride

Question 64. If a solid or liquid membrane is placed in pure water, the membrane dissolves slightly, producing an equilibrium concentration of the measured ion. This is represented as __________

A constant, E₀
Activity
Blank correction, Cb
Concentration of standard solution, Cs

Discuss Question

Answer: Option C. -> Blank correction, Cb
Answer: (c).Blank correction, Cb

Question 65. During which of the following conditions is the blank correction not necessary?

If sample concentration rises in linear response region
If sample concentration falls in linear response region
If sample concentration rises in non-linear response region
If sample concentration falls in non-linear response region

Discuss Question

Answer: Option B. -> If sample concentration falls in linear response region
Answer: (b).If sample concentration falls in linear response region

Question 66. Which of the following is not added to the sample during analysis during silica analysis?

Ammonium Molybdate
Sulphuric acid
Reducing solution
Iodine solution

Discuss Question

Answer: Option D. -> Iodine solution
Answer: (d).Iodine solution

Question 67. The output from both the detectors is given to which of the following devices?

Filters
Microprocessor
Recorder
Differential Amplifier

Discuss Question

Answer: Option D. -> Differential Amplifier
Answer: (d).Differential Amplifier

Question 68. Which of the following detectors are used in silica analyser?

Photovoltaic cell
Photo multiplier
Photo emissive tubes
Flame emission detector

Discuss Question

Answer: Option A. -> Photovoltaic cell
Answer: (a).Photovoltaic cell

Question 69. 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)?

The concentration of silica in sample and reference solution is equal
The concentration of silica in a reference solution is more than that in the sample solution
The concentration of silica in sample solution is more than that in the reference solution
Further processing is required to come to any conclusion

Discuss Question

Answer: Option A. -> The concentration of silica in sample and reference solution is equal
Answer: (a).The concentration of silica in sample and reference solution is equal

Question 70. 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)?

The concentration of silica in sample and reference solution is equal
The concentration of silica in a reference solution is more than that in the sample solution
The concentration of silica in sample solution is more than that in the reference solution
Further processing is required to come to any conclusion

Discuss Question

Answer: Option C. -> The concentration of silica in sample solution is more than that in the reference solution
Answer: (c).The concentration of silica in sample solution is more than that in the reference solution