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WorksheetsPBFP_Pure Substance Or Mixture?
Total questions: 15
Worksheet time: 8mins
What is a pure substance?
A substance with a definite and constant composition
A substance that can easily be separated into different components
A substance that has no mass
A substance that changes composition over time
What is an example of a pure substance?
Salt
Milk
Tap water
Which of the following is a heterogeneous mixture?
Water and sugar
Water and sand
Water and salt
Vinegar
What is the solvent in a sugar-water solution?
Sugar
Both
There is no solvent
Which is an example of a miscible mixture?
Oxygen and nitrogen
Olive oil in water
Milk in oil
Paper in water
What is the main difference between a homogeneous and a heterogeneous mixture?
Whether the composition is uniform or not
The presence or absence of particles
The ability to separate the components
The state of matter of the components
What do we call the substance that dissolves in a solution?
Solute
Solvent
Soluble
Liquid
Why can’t the components of a homogeneous mixture be distinguished by sight?
The composition is uniform
They are not chemically bonded
The particles are too small to be seen
The components do not mix
Which is true about the law of conservation of mass in mixtures?
The mass of a mixture equals the mass of its components
The mass of a mixture is always less than the sum of its parts
The mass of a mixture changes when components are combined
The mass of a mixture depends on the type of solution
Which of the following statements about a solution is correct?
The solute can be a solid, liquid, or gas
A solution can only form between two liquids
The solute is always in a greater amount than the solvent
A solution is a type of heterogeneous mixture
Which of the following is a molecule?
Oxygen
Helium
Sodium Chloride
Iron
Is table salt (NaCl) an atom, molecule, mixture, or compound?
atom
molecule
mixture
What is the major component of the air we breathe?
Which of the following describes a heterogeneous mixture?
Its composition can vary from one part to another.
It has the same composition throughout.
Its components are chemically combined.
It cannot be separated by physical means.
Which of the following substances is a pure substance?
Diamond
Mayonnaise
Vinegar
Milk
