1P 2exam Inorganic Chemestry

Which of the following is a pure substance?

• Air

• Water

• Sand

• Milk

What is a homogeneous mixture?

• A mixture that has a uniform composition in all its parts

• A mixture of two solids

• A pure substance formed by a single type of atom

• A mixture that has a variable composition in different parts

What is the process that separates solids from liquids using a porous medium?

• Decantation

• Filtration

• Distillation

• Crystallization

The separation method based on the difference in density of the components of a mixture is:

• Filtration

• Decantation

• Centrifugation

• Crystallization

Which separation process accelerates the sedimentation process?

• Filtration

• Centrifugation

• Decantation

• Distillation

Which method allows the separation of mixtures of liquids with different boiling points?

• Filtration

• Centrifugation

• Crystallization

• Distillation

Which separation method is based on the formation of crystals from a solution?

• Crystallization

• Filtration

• Centrifugation

• Extraction

Dalton's atomic model proposes that:

• Electrons are in circular orbits around the nucleus

• Atoms are indivisible spheres

• The atom has a dense, positive nucleus

• Atoms are made up of quarks

Which atomic model suggested that the atom has a positive nucleus with electrons in orbits?

• Dalton's model

• Rutherford's model

• Thomson's model

• Bohr's model

According to Rutherford's model, what component is at the center of the atom?

• Electrons

• Nucleus

• Vacuum

• Protons