Derivatives of Carboxylic Acid

Which is in correct against property mentioned?

Which of the following compound undergoes Claisen condensation in presence of ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{ONa}$ ?
(i) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{COOC}}_2{\mathrm{H}}_5$
(ii) ${\left({\mathrm{CH}}_3\right)}_2{\mathrm{CHCOOC}}_2{\mathrm{H}}_5$
(iii) ${\mathrm{ClCH}}_2{\mathrm{COOC}}_2{\mathrm{H}}_5$

The correct option for products $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}, \mathrm{S}$ in the following sequence of reaction is/are:

Ethyl acetate can be prepared by:

Outline reasonable mechanisms for each of the following reactions.

Outline reasonable mechanisms for each of the following reactions.

 $+{\mathrm{BrMgCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{MgBr}$ 

$\frac{1.\mathrm{THF}}{2.{\mathrm{H}}_2\mathrm{O}}$ 

Which of the following undergoes nucleophilic addition elimination?

Select the incorrect statement:

Which of the following esters have the most acidic $\mathrm{\alpha }$ -hydrogen atoms?

Which one of the following esters is the most reactive for saponification?

An organic compound $\mathrm{X}\left({\mathrm{C}}_4{\mathrm{H}}_8{\mathrm{O}}_2\right)$ gives a positive test with $\mathrm{NaOH}$ and phenolphthalein. Structure of X will be:

Consider the following statements for hydrolysis reaction:

is more reactive than ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COOC}}_2{\mathrm{H}}_5$

 is more reactive than 

 is more reactive than  

Of these the correct statements are$:-$

Product is/are:

The reason for greater reactivity of acetyl chloride for the nucleophilic substitution than methyl chloride is due to:

$\left(\mathrm{i}\right)$ Capability of oxygen to acquire electrons.
$\left(\mathrm{ii}\right)$ Difference in the nature of carbon of the intermediate tetrahedral in case of acetyl chloride and a pentavalent in case of methyl chloride.
$\left(\mathrm{iii}\right)$ Difference in attack of nucleophile on the compound.

$\left(\mathrm{iv}\right)$ Better leavability of $-\mathrm{COCl}$ than $-\mathrm{Cl}$.

In an ester molecule there are three $\mathrm{C}-\mathrm{O}$ bonds, What do you expect regarding their relative bond length?

Which of the following ester can be used as acylating agent in mixed Claisen condensation?

X and Y are:

Aspartame, an artificial sweetening agent, has the following structure

On hydrolysis with dilute $\mathrm{HCl}$, it will give

An ester (I) with molecular formula ${\mathrm{C}}_9{\mathrm{H}}_{10}{\mathrm{O}}_2$ was treated with excess of ${\mathrm{CH}}_3\mathrm{MgBr}$ and the compound so formed was treated with ${\mathrm{H}}_2{\mathrm{SO}}_4$ to give an olefin (II). Ozonolysis of (II) gave a ketone with molecular formula ${\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}$ which show positive iodoform test. The structure of (I) is:

Identify the products $\mathrm{X}, \mathrm{Y} \mathrm{and} \mathrm{Z}$ in the given reactions:

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