LSS4.2 Choosing the appropriate Separation Technique

Which separation technique is used to separate coffee ground from coffee? (one word)

Which separation technique is used to obtain salt from salt solution?

Which separation technique is used to obtain water from salt solution?

Which separation technique is used to identify harmful substances in food products?

In distillation, the condenser is used to convert a vapour into a liquid. The direction of cold water flow in the condenser is from _____

• left to right

• right to left

• top to bottom

• bottom to top

The diagram shows a process of ____ at A and ____ at B and C.

• magnetic attraction, filtration

• magnetic attraction, magnetic attraction

• filtration, magnetic attraction

• filtration, filtration

In this separation technique, The roller is magnetic but the moving belt is not. As the piece of iron on the moving belt move away from the magnetic roller, there is ____ magnetic attraction. Thus, they fall off the moving belt and into container ___.

• less, B

• less, C

• more, B

• more, C

The chromatogram of a food coloring F is compared to 4 other toxic food colorings, W, X, Y and Z. How many food dyes are present in F?

• 1

• 2

• 3

• 4

The chromatogram of a food coloring F is compared to 4 other toxic food colorings, W, X, Y and Z. The dye in X could not be investigated because X ____.

• was separated and dissolved in the solvent used.

• was separated and did not dissolve in the solvent used.

• was not separated and dissolved in the solvent used.

• was not separated and did not dissolve in the solvent used.

The chromatogram of a food coloring F is compared to 4 other toxic food colorings, W, X, Y and Z. F is ____ for consumption as it ____ similar substances that are found in Y and Z

making it toxic

• safe, contains

• safe, does not contain

• not safe, contain

• not safe, does not contain