1.

According to Le Chatelier's principle,

Answer»

an increase in pressure always causes a change in position of equilibrium for any reaction
the yield of `NH_(3)` decrease from its constituents at lower TEMPERATURE
an increase in temperature causes a decrease in the VALUE of Kc for an exothermic reaction.
the `k_(C)` is decrease for the reaction `A_((s)) + B_((g)) to C_((g))` , if the CONCENTRATION of A is increased

Solution :According to LeChatelier's principle, an increase in temperature caused a decrease in the value of `K_(c)` for an exothermic reaction.


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