Which of the following is not true for a mixture?

A mixture can be separated into its constituents.

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The composition of a mixture is variable.

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Energy is not given out in the preparation of a mixture.

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A mixture has a fixed melting point.

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Solution

The correct option is D
A mixture has a fixed melting point.

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.

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Similar questions

Few properties are mentioned below. Specify the property as mixture or compound:

STATEMENT 1: The constituents can be separated easily by physical means.

STATEMENT 2: Has a variable composition.

STATEMENT 3: Has a fixed melting and boiling point.

STATEMENT 4: Shows entirely different properties from constituent elements.

STATEMENT 1: Elements cannot be broken down into simpler substances.

STATEMENT 2: Mixtures are homogenous and heterogenous in nature.

STATEMENT 3: Constituents of a compound can be separated by chemical means.

STATEMENT 4: A mixture has a variable composition.

Few properties are mentioned below. Specify the property as mixture or compounds:

STATEMENT 1: The constituents can be separated easily by physical means.

STATEMENT 2: Has a variable composition.

STATEMENT 3: The composition is always fixed.

STATEMENT 4: Shows entirely different properties from constituent elements.

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