Equilibrium Tes...

$$pK_{b}$$ of $$NH_{3}$$ is $$4.74$$ and $$pK_{b}$$ of $$A^{-}, B^{-}$$ and $$C^{-}$$ are $$4, 5$$ and $$6$$ respectively. Aqueous solution of $$0.01\ M$$ has $$pH$$ in the increasing order.

The equilibrium, $$S{ O }_{ 2 }{ Cl }_{ 2 }(g)\rightleftharpoons S{ O }_{ 2 }(g)+{ Cl }_{ 2 }(g)$$ is attained at $${25}^{o}C$$ in a closed container and an inert gas, helium, is introduced. Which of the following statements is correct?

The equilibrium constant for the reaction $$A+B\rightleftharpoons C+D$$ is $$2.85$$ at room temperature and $$1.4\times { 10 }^{ -2 }$$ at $$698K$$. This shows that forward reaction is: 

For the reaction,
$$P{ Cl }_{ 5 }(g)\rightleftharpoons P{ Cl }_{ 3 }(g)+{ Cl }_{ 2 }(g)$$
The forward reaction at constant temperature is favoured by:

The equilibrium constant for a reaction, $$A+B\rightleftharpoons C+D$$ is $$1\times { 10 }^{ -2 }$$ at $$298K$$ and is $$2$$  at $$273K$$. The chemical process resulting in the formation of $$C$$ and $$D$$ is:

$${K}_{p}$$ for a reaction at $${25}^{o}C$$ is $$10\ atm$$. The activation energy for forward and reverse reactions are $$12$$ and $$20$$ $$kJ/mol$$ respectively. The $${K}_{c}$$ for the reaction at $${40}^{o}C$$ will be:

In a flask colourless $${N}_{2}{O}_{4}$$ is in equilibrium with brown coloured $${NO}_{2}$$. At equilibrium, when the flask is heated to $${100}^{o}C$$ the brown colour deepens and on cooling, the brown colour became less coloured. The change in enthalpy $$\Delta H$$ of the system is:

To the system
$$La{ Cl }_{ 3 }(s)+{ H }_{ 2 }O(g)\rightleftharpoons LaClO(s)+2HCl(g)$$- heat already at equilibrium, more water vapour is added without altering $$T$$ or $$V$$ of the system. When equilibrium re-established, the pressure of water vapour is doubled. The pressure of $$HCl$$ present in the system increases by a factor of:

$${Cu}^{2+}$$ ions react with $${Fe}^{2+}$$ ions according to the following reaction:
$${ Cu }^{ 2+ }+2{ Fe }^{ 2+ }\rightleftharpoons Cu+2{ Fe }^{ 3+ }$$
At equilibrium, the concentration of $${Cu}^{2+}$$ ions is not changed by the addition of: