Which is a property of plasma?
AHas fixed shape across all cases
BContains free positive ions and electrons
CIs heavier than solids
DCannot conduct electricity
Answer & Solution
Correct answer: B. Contains free positive ions and electrons
1. Plasma is a hot ionised gas state.
2. Most or all of its atoms are stripped of electrons.
3. So plasma contains free positive ions and free electrons.
4. These charged particles make plasma a good electrical conductor.
5. The sun and discharge tubes contain plasma.
_Source: Selina Concise Physics ICSE Class 8, Ch 1 'Matter'_
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