Which of the Following Statements Are True for GC Columns

question 7

Multiple Choice

Which of the following statements are true for GC columns?
I GC columns are capillaries composed of fused silica and coated with a polyimide.
II Column inner diameters are typically 0.10 cm to 0.53 cm and the columns are 15 cm to 100 cm in length,with 30 cm the most common.
III A wall-coated open tubular column has a liquid stationary phase coating the inside wall of the column.
IV A porous-layer column is filled with a highly porous stationary phase.
V A packed column is a column filled with a solid stationary support coated in liquid stationary phase.

• A)I,III,and V
• B)II and IV
• C)III,IV,and V
• D)I and II
• E)I,II,III,IV,and V

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Definitions:

CVP Analyses

Cost-Volume-Profit Analyses, a financial modelling technique that analyzes how changes in costs and volume affect a company's profits.

Estimates

Approximations or educated guesses used in planning and decision-making, especially in budgeting and forecasting.

Safety Margin

The difference between the actual performance of a business and the break-even point, indicating the buffer or cushion against drop in performance.

Product Mix

The Product Mix refers to the total variety of products and services offered by a company to its customers.