Question 33 – Elements, compounds and mixtures - Questions

The diagram below shows a laboratory set-up for paper chromatography, which can be used to separate and analyse the components of a mixture of food dyes.

A schematic diagram of paper chromatography showing a glass beaker with a lid, chromatography paper suspended inside with a baseline clearly above the shallow solvent layer, a spot of dye mixture on the baseline, and a solvent front.

These sentences describe the steps in the experimental method for carrying out this chromatography, but they are in the wrong order.

P: Draw a pencil start line near the bottom of the chromatography paper.
Q: Apply a small, concentrated spot of the dye mixture onto the pencil start line.
R: Suspend the paper in a beaker containing a shallow layer of solvent, ensuring the solvent level is below the start line.
S: Place a lid on the beaker and allow the solvent to rise up the paper.
T: Remove the paper before the solvent reaches the top, mark the solvent front, and leave it to dry.

Put a letter in each box to show the correct order of the steps. One has been done for you.

\begin{array}{|c|c|c|c|c|} \hline \quad & \quad & \text{R} & \quad & \quad \\ \hline \end{array}

The diagram below shows a laboratory set-up for paper chromatography, which can be used to separate and analyse the components of a mixture of food dyes.

These sentences describe the steps in the experimental method for carrying out this chromatography, but they are in the wrong order.

P: Draw a pencil start line near the bottom of the chromatography paper.
Q: Apply a small, concentrated spot of the dye mixture onto the pencil start line.
R: Suspend the paper in a beaker containing a shallow layer of solvent, ensuring the solvent level is below the start line.
S: Place a lid on the beaker and allow the solvent to rise up the paper.
T: Remove the paper before the solvent reaches the top, mark the solvent front, and leave it to dry.

Put a letter in each box to show the correct order of the steps. One has been done for you.

\begin{array}{|c|c|c|c|c|} \hline \quad & \quad & \text{R} & \quad & \quad \\ \hline \end{array}

Elements, compounds and mixtures

Question 19

Elements, compounds and mixtures

Question 19

Elements, compounds and mixtures

Question 19

Elements, compounds and mixtures Questions

Elements, compounds and mixtures

Question 19

Elements, compounds and mixtures Questions