Tag: all about mixtures

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Questions Related to all about mixtures

Multiple choice chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

A salt is made by adding an excess of an insoluble metal oxide to an acid. How is the excess metal oxide removed from the mixture?

  1. chromatography

  2. crystallisation

  3. distillation

  4. filtration
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
$\text{Filtration is defined as the process of separating suspended solid matter from a liquid.}$$\text{ So it can be used to remove metal oxide from the mixture.}$
Multiple choice chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

State True or False.
A mixture can not be represented by a chemical formula.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

Multiple choice chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

Example of  a 'solid in liquid' mixture is :

  1. oil in water

  2. muddy water

  3. smoke

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Phases of matter   Name of mixture  Examples
 Liquid - liquid  Emulsion  Oil in water
 Solid - liquid  Suspension  Muddy water
 Gas - liquid  Aerosol  Fizzy drinks
 gas - solid  Smoke  Smog

A mixture is a combination of two or more substances, where these substances are not bonded (or joined) to each other and no chemical reaction occurs between the substances.

Multiple choice chemistry separation of substances mixtures: examples and properties types of solutions all about mixtures

The components retain their individual properties in:

  1. Solutions

  2. Mixtures

  3. Compounds

  4. Solvents
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

1) Solution is a homogeneous mixture of two or more substances.
2)Compound a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
3) solvent is a substance that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution.

Hence only mixtures are the one in which the individual properties of the components are retained

Multiple choice chemistry pure substances and mixtures: separation of mixtures mixtures: examples and properties types of solutions all about mixtures

Steel is a type of :

  1. Solid-liquid heterogeneous mixture

  2. Solid-solid heterogeneous mixture

  3. Solid-solid homogeneous mixture

  4. Pure substance
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Centrifugation is a technique which involves the application of centrifugal force to separated particles from a solution.Generally this is used in wasting machines to separated water particles from cloths during dry washing.