Paper chromatography separates molecules by
[ Select ]
size
shape
polarity
boiling point
and we will be using it to separate
[ Select ]
carbohydrates
amino-acids
lipids
other
.

Question

Paper chromatography separates molecules by 
[ Select ]
size
shape
polarity
boiling point
 and we will be using it to separate 
[ Select ]
carbohydrates
amino-acids
lipids
other
 .

BlackTom AI · Accepted Answer

In this question, there are two blanks to fill, each relying on fundamental concepts of paper chromatography.

First blank: "Paper chromatography separates molecules by [Select] ..." Options: size, shape, polarity, boiling point. In chromatography, the separation mechanism on paper primarily depends on differential interactions with the stationary phase (the paper) and the mobile phase (the solvent). These interactions are governed mainly by polarity: more polar substances interact more strongly with the polar paper and move more slowly, while less polar substances travel with the solvent more readily. Therefore, among the given choices, polarity is the correct characteristic that governs separation by paper chromatography. The other options correspond to properties that are not the primary determinants of separation in this technique: size and shape influence separation in size-exclusion or gel-based methods, while boiling point is a property that matters in distillation or certain gas-phase methods, not in standard paper chromatography.

Second blank: "... and we will be using it to separate [Select] carbohydrates, amino-acids, lipids, other." Here we consider which biomolecules are typically separated effectively by paper chromatography. Paper chromatography is commonly used to separate and analyze amino acids because they have different polarities and interact variably with the stationary phase, allowing distinct spots to appear for different amino acids when a suitable solvent system is used. Carbohydrates can also be analyzed by chromatography, but in educational settings, amino acids are the classic target for paper chromatography demonstrations, especially when using colorimetric reagents like ninhydrin to visualize amino acids. Lipids are largely nonpolar and often require nonpolar solvents or different chromatography methods (like thin-layer chromatography with appropriate stationary phases) for effective separation, and they do not separate as reliably on standard paper chromatography without specialized conditions. Therefore, selecting amino-acids as the group to separate is the most fitting choice given typical classroom or basic lab contexts. If one were to choose carbohydrates, it would still be feasible under some solvent systems, but it is less canonical for paper chromatography demonstrations compared to amino acids. If the question allowed multiple correct selections, carbohydrates could sometimes be a contender, but amino-acids remains the safer, more conventional answer for standard paper chromatography setups.

In summary: choose polarity for the first blank, and amino-acids for the second blank as the most common and reliable pairing for paper chromatography in educational contexts. The remaining options (shape, size, boiling point; lipids or other as the target) are less consistent with typical interpretations of this technique and its common applications.

CHE 008B A01 SS1 2025 Pre-Lab Quiz - Expt. X

Paper chromatography separates molecules by [ Select ] size shape polarity boiling point and we will be using it to separate [ Select ] carbohydrates amino-acids lipids other .

View Explanation

Log in for full answers

Similar Questions

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler