MCQ
Which of the following metal does not show variable valency
- A$Fe$
- B$Hg$
- ✓$Zn$
- D$Cu$
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$2HI_{(g)} \to H_{2(g)} + I_{2(g)}$
is $200 \frac {KJ}{mol}$ at $600 \,K$. Calculate the fraction of molecules of reactant having energy equal to or greater than activation energy ?