Which of the following is described as the basic unit of matter?

• Element
• Atom
• Molecule
• Compound

Which of the following techniques can we use to separate homogeneous mixtures?

• Crystallisation

• Distillation

• Evaporation

• All of the above

Name the separation technique

• Centrifuge

• Bunsen burner

• Distillation

• Evaporation

Name the separation technique

• Distillation

• Crystallisation

• Magnetic Separation

• Condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Name the separation technique

• Filtration

• Evaporation

• Distillation

• Separation

In a salt water solution ...

• Salt is the solute and water is the solvent

• Salt is the solvent and water is the solute

Which of the following statements tells us that a sample of liquid is pure water?

• It is colourless.

• It leaves no residue when filtered.

• It boils at 100^oC.

• It is odourless.

What is the name of this separation technique?

• distillation

• filtration

• evaporation

• chromatography

For paper chromatography to work,

• the dyes must have different boiling points.

• the dyes must have different solubilities in the solvent.

• the starting line on the chromatogram must be drawn using pen.

• The starting line must be below the level of the solvent.

Which ink is most soluble?

• Blue

• Red

• Yellow

• Green