NEET UG 2015 — Organic Chemistry

In which of the following compounds, the $C-Cl$ bond ionization shall give most stable carbonium ion?

The functional group which is formed when Phenol is made to react with Chloroform in the presence of dilute Sodium hydroxide

Given,  The enthalpy of hydrogenation of these compounds will be in the order as:

The oxidation of benzene by ${V}_{2}{O}_{5}$ in the presence of air produces:

Consider the following compounds  Hyperconjugation occurs in:

In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is:

The reaction of ${C}_{6}{H}_{5}CH=CHC{H}_{3}$ with HBr produces:

The electrolytic reduction of nitrobenzene in strongly acidic medium produces:

The following reaction  Is known by the name:

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

The number of structural isomers possible from the molecular formula ${C}_{3}{H}_{9}N$ is:

Which of the following reaction(s) can be used for the preparation of alkyl halides? I. $C{H}_{3}C{H}_{2}OH+HCl\overset{Anhyd. ZnC{l}_{2}}{\rightarrow }$ II. $C{H}_{3}C{H}_{2}OH+HCl\longrightarrow$ III. ${(C{H}_{3})}_{3}COH+HCl\longrightarrow$ IV. ${(C{H}_{3})}_{2}CHOH+HCl\overset{Anhyd. ZnC{l}_{2}}{\rightarrow }$

Two possible stereo-structures of $C{H}_{3}CHOHCOOH$, which are optically active, are called:

In an ${S}_{N}1$ reaction on chiral centres, there is:

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

Which of the following statements is not correct for a nucleophile?

Given,  Which of the given compounds can exhibit tautomerism?

Method by which Aniline cannot be prepared is:

An organic compound 'X' having molecular formula ${C}_{5}{H}_{10}O$ yields phenyl hydrazone and gives negative response to the iodoform test and Tollen's test. It produces n-pentane on reduction. 'X' could be:

Treatment of cyclopentanone  with methyl lithium gives which of the following species?

In the reaction with $\mathrm{HCl}$, an alkene reacts following the Markovnikov's rule to give the product $1-$chloro$-1-$methylcyclohexane. The possible reaction of the alkene is

Which of the following is the most correct electron displacement for a nucleophile reaction to take place?

A single compound of the structure  is obtainable from ozonolysis of which of the following cyclic compounds?

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

The reaction  is called:

Which of the following is not the product of dehydration of  ?