# The metal carbonate which decomposes easily on heating is

$\begin{array}{1 1}(a)\;Na_2CO_3&(b)\;BaCO_3\\(c)\;BeCO_3&(d)\;K_2CO_3\end{array}$

The metal carbonate which decomposes easily on heating is $BeCO_3$
Hence (c) is the correct answer.