By writing chemical equations
Give two examples of chemical decomposition when a compound decomposes to form only elements.

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Solution

Water on decomposition gives hydrogen and oxygen.
$2 H_{2} O \overset{elec}{\to} 2 H_{2} + O_{2}$
Silver bromide on heating decomposes into silver and bromine
$2 AgBr \overset{hv}{\to} 2 Ag + {Br}_{2}$

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