The fourth state of matter is known as
(A) Gas
(B) Vapour
(C) Plasma
(D) Electrons
Question Asked : SSC Combined Graduate Level Prelim Exam 2005
Explanation : The characteristics of plasmas are significantly different from those of ordinary neutral gases so that plasmas are considered a distinct "fourth state of matter. It is a state of matter similar to gas in which a certain portion of the particles is ionized. Heating a gas may ionize its molecules or atoms (reduce or increasing the number of electrons in them), thus turning it into a plasma, which contains charged particles: positive ions and negative electrons or ions.
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Tags : Physics