Question

The dissociation of $CaC{O}_3$ is suppressed at high pressure.
If true enter 1, if false enter 0.

Answer 1

The dissociation of $CaC{O}_3$ is suppressed at high pressure.

$CaC{O}_3\left(s\right)\rightleftharpoons CaO\left(s\right)+C{O}_2\left(g\right)$

$\Delta n=\left(0+1\right)-0=1$

Thus, the reaction proceeds with increase in the number of moles of gaseous species. At high pressure, the equilibrium will shift in the reverse direction so that the effect of increased pressure is minimized. This suppresses the dissociation.