Which one of the following correctly represents the decreasing order of acidic nature of the given carboxylic acids:
[A] 2-Hydroxybenzoic acid
[B] Benzoic acid
[C] 3-Hydroxybenzoic acid
[D] 4- Hydroxybenzoic acid
If the depression in freezing point of an aqueous solution containing a solute, which is neither dissociated nor associated, is $$\mathbf{a} \mathrm{K}$$ with $$\mathrm{K}_{\mathrm{f}}=\mathbf{b ~ K ~ k g ~ m o l}{ }^{-1}$$, what would be the elevation in boiling point $$(\mathrm{X})$$ for this solution if its $$\mathrm{K}_{\mathrm{b}}=\mathbf{\mathrm { ~K } \mathrm { ~K } \mathrm { ~kg } \mathrm { ~mol }}{ }^{-1}$$ ?
The rate constant for a First order reaction at $$560 \mathrm{~K}$$ is $$1.5 \times 10^{-6}$$ per second. If the reaction is allowed to take place for 20 hours, what percentage of the initial concentration would have converted to products?
What would be the final product [$$\mathbf{X}$$] formed when p-Toluidine undergoes the following series of reactions?
$$\begin{aligned} & \text { P-Toluidine } \xrightarrow[\text { Pyridine }]{\left\{\mathrm{CH}_2, \mathrm{CO}_2 \mathrm{O}\right.}[\mathrm{P}] \\ & {[\mathrm{P}] \xrightarrow{\mathrm{Br}_2 / \mathrm{CH}_3 \mathrm{COOH}}[\mathrm{O}]} \\ & {[\mathrm{Q}] \xrightarrow[\Delta]{\text { dilŠ½G }}[\mathrm{R}]} \\ & {\mathrm{[R]} \xrightarrow[0^{\circ} \mathrm{C}]{\mathrm{Nan}_2 / \mathrm{HCl}}\mathrm{[S]}} \\ & {[\mathrm{S}] \xrightarrow{\mathrm{H}_2 \mathrm{PO}_2}[\mathrm{X}]} \\ \end{aligned}$$
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