Structure Of Atom Ques 49
49. The energy absorbed by each molecule $(A_2)$ of a substance is $4.4 \times 10^{-19} $ $J$ and bond energy per molecule is $4.0 \times 10^{-19} $ $J$. The kinetic energy of the molecule per atom will be:
[2009]
(a) $2.2 \times 10^{-19} $ $J$
(b) $2.0 \times 10^{-19} $ $J$
(c) $4.0 \times 10^{-20} $ $J$
(d) $2.0 \times 10^{-20} $ $J$
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Answer:
Correct Answer: 49.(d)
Solution:
- (d) $K.E$ per atom
$ \begin{aligned} & =\frac{(4.4 \times 10^{-19})-(4.0 \times 10^{-19})}{2} \\ & =\frac{0.4 \times 10^{-19}}{2}=2.0 \times 10^{-20} J \end{aligned} $
BETA
