Out of the following, an example of matter which can be termed as fluid is :(a) carbon (b) sulphur (c) oxygen (d) phosphorus
Correct answer: (c) oxygen
Explanation: Oxygen can be considered to be fluid because oxygen is a gas and its particles are completely free to move. Sulphur exists in many forms; however, all of them are solids. Hence sulphur cannot be called a fluid. Carbon also has many allotropes but all of them are solid, hence it can also not be called a fluid. Similarly, phosphorus is also solid.
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