Chemistry Organic Chemistry questions from JEE Main 2006.
The increasing order of stability of the following free radicals is
$\mathrm{HBr}$ reacts with $\mathrm{CH}_2=\mathrm{CH}-\mathrm{OCH}_3$ under anhydrous conditions at room temperature to give
 The electrophile involved in the above reaction is
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) 
The increasing order of the rate of $\mathrm{HCN}$ addition to compounds $\mathrm{A}-\mathrm{D}$ is (A) $\mathrm{HCHO}$ (B) $\mathrm{CH}_3 \mathrm{COCH}_3$ (C) $\mathrm{PhCOCH}_3$ (D) PhCOPh
 The alkene formed as a major product in the above elimination reaction is
The structure of the compound that gives a tribromo derivative on treatment with bromine water is
The structure of the major product formed in the following reaction 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) $\left.\mathrm{CH}_3 \mathrm{O}^{-}\right]$
Fluorobenzene $\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{~F}\right)$ can be synthesized in the laboratory
Phenyl magnesium bromide reacts with methanol to give
The pyrimidine bases present in DNA are
The term anomers of glucose refers to
Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces
Among the following the one that gives positive iodoform test upon reaction with $\mathrm{I}_2$ and $\mathrm{NaOH}$ is
Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is