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WorksheetsQuiz on Pure Substances and Mixtures
Total questions: 15
Worksheet time: 11mins
What is a pure substance?
A material made of only one type of particle
A combination of two or more substances
A substance that can be separated by physical means
A mixture that has uniform composition
Which of the following is an example of a compound?
Oxygen (O₂)
Water (H₂O)
Sodium (Na)
Iron (Fe)
What distinguishes a homogeneous mixture from a heterogeneous mixture?
Homogeneous mixtures can be separated by filtration
Homogeneous mixtures have a uniform composition
Homogeneous mixtures contain only one type of substance
Homogeneous mixtures are always liquids
Which of the following is a characteristic of heterogeneous mixtures?
They appear the same throughout
They can be easily separated into their components
They consist of only one phase
They cannot be separated by physical means
Which of the following is NOT a separation technique for mixtures?
Filtration
Distillation
Synthesis
Chromatography
What is the main difference between an element and a compound?
Elements are made of two or more types of atoms
Compounds can be broken down into simpler substances
Elements can be separated by chemical means
Compounds are always gases
Which of the following is an example of a homogeneous mixture?
Salad
Air
Sand and salt mixture
Oil and water
Which of the following is an example of a heterogeneous mixture?
Vinegar
Steel
Salad dressing
Sugar water
What is the definition of an element?
A substance that can be broken down into simpler substances
A pure substance made of only one type of atom
A mixture of two or more compounds
A substance that has a variable composition
Which separation technique uses differences in boiling points?
Filtration
Distillation
Evaporation
Centrifugation
Which of the following is a characteristic of pure substances?
They can be physically separated
They have a fixed composition
They can be a mixture of elements and compounds
They are always solid
Which of the following mixtures is homogeneous?
Concrete
Oil and vinegar
Saltwater
Fruit salad
Which of the following is a method to separate a solid from a liquid?
Distillation
Filtration
Chromatography
Sublimation
Which of the following is an example of a pure substance?
Air
Gold (Au)
Sea water
Soil
What type of mixture is formed when sand is mixed with water?
Homogeneous
Heterogeneous
Compound
Element
