Chemistry 101 Quiz_CH01

Which of the following is a chemical property of a substance?

• Color
• Density
• Flammability
• Boiling Point

What distinguishes a compound from an element?

• Compounds have a definite composition
• Compounds can be decomposed into simpler substances
• Elements have varying compositions
• Elements can be decomposed into simpler substances

Which of the following is an example of an intensive property?

• Mass
• Volume
• Energy
• Density

What is the primary difference between a homogeneous and a heterogeneous mixture?

• Homogeneous mixtures have a uniform composition
• Heterogeneous mixtures have a uniform composition
• Homogeneous mixtures can be separated by filtration
• Heterogeneous mixtures cannot be separated

Which method is used to separate mixtures based on particle size?

• Chromatography
• Filtration
• Distillation
• Centrifugation

How does chromatography separate substances?

• By boiling point differences
• By particle size
• By adherence to different materials
• By density differences

Which of the following is a derived unit for volume?

• Kilogram
• Meter
• Liter
• Gram

What is the significance of significant figures in measurements?

• They indicate the exactness of a measurement
• They show the reliability of a measurement
• They are used to convert units
• They determine the mass of a substance

Which of the following best describes a physical change?

• A change that results in new substances
• A change that alters the composition of a substance
• A change that does not alter the composition of a substance
• A change that involves combustion

What is the relationship between the concentration of major species in a mixture of strong acids and bases?

• They react quantitatively to form water
• They remain unchanged
• They form a precipitate
• They increase the pH