What is unstable equilibrium ?

What is thermal equilibrium ? Explain.

What is the equilibrium constant expression for the reaction?

A certain weak acid has a dissociation constant 1.0 xx 10^-4. What is the equilibrium constant for its reaction with a strong base?

What is the equilibrium expression for the reaction: P_4(s)+5O_2(g) hArr P_4O_10(s)

The formation of phosgene is represented as , CO+ Cl_2 hArr COCl_2 The reaction is carried out in 500 ml flask. At equilibrium 0.3 mole of phosgene, 0.1 mole of CO and 0.1 mole of Cl_2 are present. What is the equilibrium constant of the reaction ?