Choose the incorrect statement ........

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Choose the incorrect statement.

Plasma the fourth state of matter is a mixture of charged particles(electrons and ions).

Plasma displays televisions have the plasma state present.

Naturally plasma state is formed in stars and while lightening.

It is possible to obtain a perfect vaccum.

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Explanation:

it is impossible to make a perfect vacuum. A perfect vacuum is defined as a region in space without any particles.The problem is that to maintain a vacuum in a region you have to shield it from the environment. It is not difficult to make a container that would prevent atoms from entering the region. The first problem is that the container itself will radiate photons (which in turn can create electron positron pairs in the vacuum) if it is not kept at a temperature of 0ï¿½K. Note that a perfect vacuum has by definition a temperature of 0ï¿½K. reaching 0 ï¿½K is practically impossible.