Organic Chemistry PYQ — Page 72

The term anomers of glucose refers to

Phenyl magnesium bromide reacts with methanol to give

The structure of the compound that gives a tribromo derivative on treatment with bromine water is

Among the following the one that gives positive iodoform test upon reaction with $\mathrm{I}_2$ and $\mathrm{NaOH}$ is

Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

The correct order of increasing acid strength of the compounds is (a) $\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H}$ (b) $\mathrm{MeOCH}_2 \mathrm{CO}_2 \mathrm{H}$ (c) $\mathrm{CF}_3 \mathrm{CO}_2 \mathrm{H}$ (d) 

Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is

$$ \mathrm{CH}_3 \mathrm{Br}+\mathrm{Nu}^{-} \longrightarrow \mathrm{CH}_3-\mathrm{Nu}+\mathrm{Br}^{-} $$ The decreasing order of the rate of the above reaction with nucleophiles $\left(\mathrm{Nu}^{-}\right) \mathrm{A}$ to $\mathrm{D}$ is $\left[\mathrm{Nu}^{-}=(\mathrm{A}) \mathrm{PhO}^{-}\right.$, (B) $\mathrm{AcO}^{-}$, (C) $\mathrm{HO}^{-}$, (D) $\left.\mathrm{CH}_3 \mathrm{O}^{-}\right]$

The increasing order of stability of the following free radicals is

The structure of the major product formed in the following reaction is 

The pyrimidine bases present in DNA are

p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is

Alkyl halides react with dialkyl copper reagents to give

The best reagent to convert pent -3- en-2-ol into pent -3-en-2-one is

The reaction  is fastest when X is

The decreasing order of nucleophilicity among the nucleophiles 

Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water during the reaction is continuously removed. The compound formed is generally known as

2 methylbutane on reacting with bromine in the presence of sunlight gives mainly

Elimination of bromine from 2-bromobutane results in the formation of-

Due to the presence of an unpaired electron, free radicals are:

Reaction of one molecule of $\mathrm{HBr}$ with one molecule of 1,3 -butadiene at $40^{\circ} \mathrm{C}$ gives predominantly

Among the following acids which has the lowest $\mathrm{pK}_{\mathrm{a}}$ value

Which one of the following methods is neither meant for the synthesis nor for separation of amines?

Amongst the following the most basic compound is