Understanding Chemical Concepts and Properties Pt 2.

What does the term "anhydrous" mean?

• Contains water

• Lacks water

• Contains oxygen

• Lacks oxygen

Which of the following is an example of filtration?

• Pouring off clear liquid from settled sediment

• Using filter paper to separate coffee grounds from brewed coffee

• Mixing salt in water

• Heating a solution to evaporate the solvent

What is the process of carefully pouring off a liquid from a solid called?

• Filtration

• Decantation

• Distillation

• Evaporation

Which of the following is a characteristic of acids?

• Donate hydroxide ions (OH⁻)

• Accept protons (H⁺)

• Donate protons (H⁺)

• Accept electrons

Which of the following is a base?

• Hydrochloric acid (HCl)

• Sodium hydroxide (NaOH)

• Sulfuric acid (H₂SO₄)

• Nitric acid (HNO₃)

What type of property is reactivity with acids?

• Physical property

• Chemical property

• Mechanical property

• Thermal property

Which of the following is a physical property?

• Reactivity with oxygen

• Color

• Flammability

• Corrosiveness

Which of the following is a diatomic molecule?

• Carbon dioxide (CO₂)

• Methane (CH₄)

• Oxygen (O₂)

• Water (H₂O)

What is the chemical formula for anhydrous copper (II) sulfate?

• CuSO₄·5H₂O

• CuSO₄

• Cu₂SO₄

• CuSO₃

Which of the following processes involves separating solids from liquids using a barrier?

• Decantation

• Filtration

• Sublimation

• Crystallization