For the equilibrium system $CO_{2(s)} \rightleftharpoons CO_{2(g)}$,$\Delta H = +ve$,what happens if the temperature is decreased?

Aqueous solution of ferric nitrate when mixed with aqueous solution of potassium thiocyanate gives a red coloured solution. The intensity of the red colour becomes constant upon attaining equilibrium. Choose the correct statement when the following chemicals are added to the above solution at equilibrium:
$I$. Oxalic acid
$II$. Mercuric chloride

Which of the following can be explained by Le Chatelier's principle?

The yield of the products in the reaction,$A_{2(g)} + 2B_{(g)} \rightleftharpoons C_{(g)} + Q \ kJ$ would be higher at

When in any system at equilibrium state,pressure,temperature,and concentration are changed,then the equilibrium shifts in such a direction as to neutralize the effect of the change. This is known as:

For the formation of $NH_{3(g)}$ from its constituent elements,the favourable conditions for its formation are