Mixture and their seperation

Which of the following is not a pure substance?

• Chlorine

• Air

• Water

• Salt

Which of the following is a pure substance?

• A solution

• Different gases

• Lemonade

• Salt

Which of the following compound can be seperated by filteration?

• Element

• Compound

• Mixture

• All of the above

No energy is emitted or absorbed in making .................

• element

• mixture

• compound

• all of the above

Which of the following is used to seperate light fine insoluble particles from a liquid?

• SImple distillation

• Centrifuging

• Paper chromatography

• Fractional distillation

Which of the following is used to seperate a substance which has a very small amount of solute in it?

• Simple distillation

• Centrifuging

• Paper chromatography

• Seperating funnel

Which of the following are used to test the purity of a substance?

• Melting point

• Boiling point

• Chromatography

• All of the above

The more salt it added to the substance the less boiling it has.

• True

• False

The more salt is added to a substance, the ............... melting point it has.

• more

• less

• equal

In this type of compound, the physical and chemical properties of the original and the compound it becomes is quite different.

• Compound

• Mixture

• Both of them

• None of them