Test: Classification Of Matter

5 Questions MCQ Test Science Class 9 | Test: Classification Of Matter

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Kinetic energy of molecules is directly proportional to


Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions.

Kinetic Molecular Theory can be used to explain both Charles’ and Boyle’s Laws.

The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only.


Which of the following statements is uncommon for both elements and compounds?


An element is a simple substance that cannot be broken down into simpler substances. There are more than 100 elements found on Earth. Eg., oxygen, hydrogen, gold, silver, etc.


Which of the following is not true for a mixture?


A mixture does not have a fixed melting point, boiling point etc. On the other hand, compounds have a a fixed melting point, boiling point.


A compound is a _______ substance made up of _______.


A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.


Which of the following is not a pure substance?


Tap water is not a pure substance because it is mixed with chemicals that purify it and if it was from the ground it has naturally occurring minerals mixed in it.

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