Organic Chemistry PYQ — Page 70

Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is :

Phenol is heated with a solution of mixture of $\mathrm{KBr}$ and $\mathrm{KBrO}_3$. The major product obtained in the above reaction is

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

In the chemical reactions,  the compounds ' $\mathrm{A}$ ' and ' $\mathrm{B}$ ' respectively are

The correct order of increasing basicity of the given conjugate bases $\left(\mathrm{R}=\mathrm{CH}_3\right)$ is

Biuret test is not given by

$29.5 \mathrm{mg}$ of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in $20 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{HCl}$ solution. The excess of the acid required $15 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{NaOH}$ solution for complete neutralization. The percentage of nitrogen in the compound is

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of $44 \mathrm{u}$. The alkene is

From amongst the following alcohols the one that would react fastest with conc. $\mathrm{HCl}$ and anhydrous $\mathrm{ZnCl}_2$, is

The main product of the following reaction is $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}\left(\mathrm{CH}_3\right)_2 \stackrel{\text { conc. } \mathrm{H}_2 \mathrm{SO}_4}{\longrightarrow}$ ?

Consider the following bromides :  The correct order of $\mathrm{S}_{\mathrm{N}} 1$ reactivity is

Out of the following, the alkene that exhibits optical isomerism is

Arrange the carbanions, $\left(\mathrm{CH}_3\right)_3 \overline{\mathrm{C}}, \overline{\mathrm{C}} \mathrm{Cl}_3,\left(\mathrm{CH}_3\right)_2 \overline{\mathrm{C}} \mathrm{H}, \mathrm{C}_6 \mathrm{H}_5 \overline{\mathrm{C}} \mathrm{H}_2$, in order of their decreasing stability :

The IUPAC name of neopentane is

The two functional groups present in a typical carbohydrate are :

Which of the following on heating with aqueous $\mathrm{KOH}$, produces acetaldehyde ?

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

In Cannizzaro reaction qiven below 

The number of stereoisomers possible for a compound of the molecular formula $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}(\mathrm{OH})-\mathrm{Me}$ is :

A liquid was mixed with ethanol and a drop of concentrated $\mathrm{H}_2 \mathrm{SO}_4$ was added. A compound with a fruity smell was formed. The liquid was:

The alkene that exhibits geometrical isomerism is:

The electrophile, $\mathrm{E}^{\oplus}$ attacks the benzene ring to generate the intermediate $\sigma$-complex. Of the following, which $\sigma$-complex is of lowest energy?

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

The organic chloro compound, which shows complete stereochemical inversion during a $\mathrm{S}_{\mathrm{N}} 2$ reaction, is