RAJASTHAN PMT Rajasthan - PMT Solved Paper-2005

  • question_answer
    The value of amu is which of the following?

    A) \[1.57\times {{10}^{-24}}kg\]

    B) \[1.66\times {{10}^{-124}}kg\]

    C) \[1.99\times {{10}^{-124}}kg\]

    D) \[1.66\times {{10}^{-27}}kg\]

    Correct Answer: D

    Solution :

    amu represents atomic mass unit. It is used in place of unified mass unit. 1 amu = 1 Avogram = 1 Aston = 1 Dalton 1 amu\[=\frac{1}{12}\times \]mass of \[C\text{-}12\] atom            \[=\frac{1}{12}\times 1.9924\times {{10}^{-23}}kg\]            \[=1.66\times {{10}^{-24}}g\]            \[=1.66\times {{10}^{-27}}kg\]


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