Which one of the following esters gets hydrolysed most easily under alkaline conditions?

The descending order of acidity for the following carboxylic acids is:
$A.$ $CH_3COOH$
$B.$ $F_3C-COOH$
$C.$ $ClCH_2-COOH$
$D.$ $FCH_2-COOH$
$E.$ $BrCH_2-COOH$
Choose the correct answer from the options given below:

$CH_2=CH-CO-OCH_3$ (methyl acrylate,bp $81^\circ C$) + $CH_3-CH_2-CH_2-CH_2-OH$ (n-butyl alcohol,bp $117^\circ C$) $\xrightarrow{TsOH, \Delta} (A)$ (bp $145^\circ C$) + $CH_3OH$ (bp $65^\circ C$). Product $(A)$ of the above reaction is:

Arrange the following in decreasing order of their acidic strength and give reason for your answer: $CH_{3}CH_{2}OH$,$CH_{3}COOH$,$ClCH_{2}COOH$,$FCH_{2}COOH$,$C_{6}H_{5}CH_{2}COOH$.

Which among the following reagents forms alcohol when reacted with $R-COOH$?

What is obtained when the silver salt of a fatty acid is refluxed with an alkyl halide?