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Comment on the statement that " colloid ...

Comment on the statement that `"` colloid is not a substance but state of a substance `"`

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“Colloid is not a substance but a state of substance” is a true statement. Because there are some substances which are crystalloid under certain conditions but colloid under the other. e.g., NaCl is such substance which is called a crystalloid and behaves as a crystalloid in aqueous medium. But when mixed with benzene, it behaves as colloid.
So, the above statement is correct.
Moreover, the diameter of colloidal particles ranges from 1 to 1000 nm. If particle diameter is lesser than 1 nm, the solution is true solution and if it is more than 1000 nm, the solution is a suspension.
The colloidal state is an intermediate state between these two.
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