InterviewSolution
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InterviewSolution
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Assertion : The molecules of a monatomic gas has three degrees freedom. Reason : The molecules of a diatomic gas has five degrees of freedom.A. If both assertion and reason are true and the reason is correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true, but the reason is false.D. If assertion is false but the reason is true |
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Answer» Correct Answer - B A monatomic gas molecules consists of a single atom. It can have translational motion in any direction in space. Thus, it has 3 translation degree of freedom. `f = 3 ` all transnation it can also rotate but due to its small moment of inertial rotational kinetic energy is neglected. The molecules of a diatomic gas(like `O_(2),CO_(2),H_(2))` cannot only move bodily but also rotate about any one of the three co-ordinate axes. Hence, it can have only two rotational degree of freedom. Thus a diatomic molecule has 5 degree of freedom. 3 translational and 2 rotational. |
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