Equilibrium Tes...

At $$90^oC$$, pure water has $$[H_3O^{\oplus}]=10^{-6.7}\, mol\, L^{-1}$$. What is the value of $$K_w$$ at $$90^oC$$? 

$$pOH$$ of $${H}_{2}O$$ is $$7.0$$ at $$298\ K$$. If water is heated at $$350\ K$$, which of the following should be true?

At $$55^0 C$$, autoprotolysis constant of water is $$4 \times {10}^{-14}$$. If a given sample of water has a $$pH$$ of 6.9, then it is:

The solubility of $$Ca{ F }_{ 2 }  \left( { K }_{ sp } = 3.4 \times { 10 }^{ -11 } \right)$$ in $$0.1  M$$ solution of $$NaF$$ would be

$$C\:(diamond)\rightleftharpoons C\:(graphite)$$  $$\Delta _{r}=-1.9\:kJ/mole$$
Densities of diamond and graphite are $$3.5$$ and $$2.3\:g/mL$$. Favourable conditions for formation of diamond are :

The equilibrium $$SO_{2}Cl_{2}(g)\rightleftharpoons SO_{2}(g)+Cl_{2}(g)$$ is attained at $$25^{\circ}C$$ in a closed rigid container when an inert gas, helium is introduced. Which of the following statement is/are correct :

An exothermic reaction is represented by the graph:

Which of the following expressions is/are not true?

The value of K for a reaction can be changed by changing ____.

If concentration quotient, $$Q$$ is greater than $${K_c}$$, the net reaction is taking place in backward direction.