$A$ reversible reaction is in equilibrium. If a factor is changed which affects it,then:

Which of the following reactions will be affected by increasing the pressure? Also,mention whether the change will cause the reaction to proceed in the forward or backward direction.
$(i)$ $COCl_{2(g)} \longleftrightarrow CO_{(g)} + Cl_{2(g)}$
$(ii)$ $CH_{4(g)} + 2S_{2(g)} \longleftrightarrow CS_{2(g)} + 2H_2S_{(g)}$
$(iii)$ $CO_{2(g)} + C_{(s)} \longleftrightarrow 2CO_{(g)}$
$(iv)$ $2H_{2(g)} + CO_{(g)} \longleftrightarrow CH_3OH_{(g)}$
$(v)$ $CaCO_{3(s)} \longleftrightarrow CaO_{(s)} + CO_{2(g)}$
$(vi)$ $4NH_{3(g)} + 5O_{2(g)} \longleftrightarrow 4NO_{(g)} + 6H_2O_{(g)}$

In which of the following equilibrium systems is the rate of the backward reaction favoured by an increase of pressure?

Consider the following reaction where the enthalpy change is positive: $2A_{(g)} \rightleftharpoons C_{(g)} + D_{(g)}$. Which of the following will not affect the equilibrium?

Explain the effect of temperature change on chemical equilibrium with an example.

$2B_{(g)} + 2C_{(g)} \rightleftharpoons 3A_{(g)} + \text{heat}$; necessary conditions to obtain high amount of $A$ are