Questions and answers for exam Preparation

MCQs

Total Questions : 136 | Page 2 of 14 pages

Question 11. Which of the following are the practical problems that arise due to the decrease in column diameter?

Requirement of large particle size and high pressure drop
Requirement of large particle size and low pressure drop
Requirement of small particle size and high pressure drop
Requirement of small particle size and low pressure drop

Discuss Question

Answer: Option C. -> Requirement of small particle size and high pressure drop
Answer: (c).Requirement of small particle size and high pressure drop

Question 12. Which of the following columns are not used in liquid or high performance liquid chromatography?

Analytical column
Separation column
Guard column
Capillary column

Discuss Question

Answer: Option D. -> Capillary column
Answer: (d).Capillary column

Question 13. Which of the following is not true about the guard column used in liquid chromatography?

It filters particles that clog the separation column
It extends the lifetime of separation column
It allows particles that cause precipitation upon contact with stationary or mobile phase
The size of packing varies with the type of protection needed

Discuss Question

Answer: Option C. -> It allows particles that cause precipitation upon contact with stationary or mobile phase
Answer: (c).It allows particles that cause precipitation upon contact with stationary or mobile phase

Question 14. Which of the following is not a Column-type Liquid chromatography?

Gel permeation
Ion exchange
Liquid-solid
Paper

Discuss Question

Answer: Option D. -> Paper
Answer: (d).Paper

Question 15. Which of the following is not true about the radial compression column when compared to standard separation column?

Internal diameter decreases
Overall operating pressure decreases
Analysis time decreases
Solvent flow increases

Discuss Question

Answer: Option A. -> Internal diameter decreases
Answer: (a).Internal diameter decreases

Question 16. Sample injection port must be maintained at a temperature at which rapid vapourisation occurs but thermal degradation does not occur.

True
False
May be True or False
Can't say

Discuss Question

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

Question 17. Which of the following is not a desirable feature of the ovens used in gas chromatography?

It must have a fast rate of heating
Power consumption should be kept low
It must have maximum thermal gradients
It should have proper insulation

Discuss Question

Answer: Option C. -> It must have maximum thermal gradients
Answer: (c).It must have maximum thermal gradients

Question 18. Which of the following is not an ideal characteristic of a detector used in gas chromatography?

Linear response to the solutes
Short response time
High reliability
Sensitive to the changes in the flow rate of a carrier gas

Discuss Question

Answer: Option D. -> Sensitive to the changes in the flow rate of a carrier gas
Answer: (d).Sensitive to the changes in the flow rate of a carrier gas

Question 19. Which of the following is not a type of detector used in gas chromatography?