Question

Reaction which represents the decomposition of a compound into its constituent elements is:

• A. $A{g}^{+}+B{r}^{-}\to AgBr$
• B. ${}_6^{14}C{\to }_7^{14}N{+}_{-1}^{0}e$
• C. ${}_{92}^{234}U{\to }_{90}^{230}Th{+}_2^{4}He$
• D. ${}_{15}^{30}P{\to }_{14}^{30}Si{+}_1^{0}e$
• E. $2HgO\to 2Hg+O_2$

Answer 1

Answer: (E)

$2HgO\to 2Hg+O_2$

$2HgO\to 2Hg+O_2$ represent the decomposition of a compound into its constituent elements. Mercury (II) oxide decomposes into $Hg$ and $O$.