Chemical Kineti...

Among the following, the maximum covalent character is shown by the compound

Nitric oxide, NO, and bromine vapour react together according to the following equation.
$$2NO(g)+Br_2(g)\rightarrow 2NOBr(g)$$
$$\Delta H^o=-23$$kJ$$mol^{-1}$$
The reaction has an activation energy of $$+5.4$$ kJ $$mol^{-1}$$.
What is the correct reaction pathway diagram for this reaction?

If reaction A and B are given with Same temperature and same concentration but rate of $$A$$ is double than $$B$$. Pre exponential factor is same for both the reaction then difference in activation energy $$E_{A} - E_{B}$$ is?

For what type of the following reactions is the law of mass action, never obeyed?

$$k$$ for a zero order reaction is $$2\times 10^{-2}\ mol\ L^{-1}\ s^{-1}$$. If the concentration of the reactant after $$25\ s$$ is $$0.5\ M$$, the initial concentration must have been:

$$10\%$$ of a reactant decomposes in $$1$$ hour , $$20\%$$ in $$2$$ hours and $$30\%$$ in $$3$$ hours. The order of the reaction is

In a first order reaction of the type $$A(g)\rightarrow 2B(g)$$, the initial and final pressures are $$p_{1}$$ and $$p$$ respectively. The rate constant can be expressed by

Half-life is independent of the concentration of $$A$$. After $$10$$ minutes, the volume of $$N_2$$ gas is $$10 L$$ and after completion of reaction, it is $$50 L$$. 

The gas phase decomposition of dimethyl ether follows first order kinetics:
$$CH_{3}-O-CH_{3}(g)\rightarrow CH_{4}(g)+H_{2}(g)+CO(g)$$