The reaction of 2-bromopentane with sodium ethoxide in ethanol predominantly yields:

Explain the trend in bond enthalpies of C-X bonds where X represents halogens.

Read the following statements

A. Gabriel phthalimide synthesis is used to prepare all ${1^0}$ amines

B. ${C_6}{H_5}Cl{C_6}{H_5} - {C_6}{H_5}$ is known as Wurtz reaction.

C. In $S{N^1}$ mechanism there is more inversion than retention leading to partial racemization

D. All aldehydes give red precipitate with Fehling’s solution

E. Reactivity order of alkyl halides towards $S{N^2}$ reaction is ${1^0} > {2^0} > {3^0}$

Number of correct statements among these

$C{H_3} - CH - C{H_2} - C{H_3}\xrightarrow[{UV}]{{C{l_2}}}A\,\left( {{\rm{major}}} \right),\,A$ is

Amongst the following which of the above are true for ${S_N}2\;$ reaction? (i) The rate of reaction is independent of the concentration of the nucleophile.

(ii) The nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.

(iii) the reaction proceeds with simultaneous bond formation and bond rupture

In the Hell-Volhard-Zelinsky reaction, carboxylic acids react with bromine in the presence of phosphorus. What is the major product formed when butanoic acid is treated with $Br_2$ and P, followed by hydrolysis?

The correct sequence of bond enthalpy of '$C - X$' bond is:

$t$-butyl chloride reacts with ${\rm{O}}{{\rm{H}}^ - }$ by ${{\rm{S}}_{\rm{N}}}1$ mechanism and rate $\propto [t$- buty1 chloride]. One of the reasons for this is that

Polymerization of alkenes takes place through

Best reagent for preparing a chloro alkane from an alcohol is

Which of the following reaction(s) can be used for the preparation of alkyl halides?

i) $C{H_3}C{H_2}OH + HCl\xrightarrow{{{\rm{Anhyd}}{\rm{.ZnC}}{{\rm{l}}_2}}}$

ii) $C{H_3}C{H_2}OH + HCl o$

iii) ${(C{H_3})_3}COH + HCl o$

iv) ${(C{H_3})_2}CHOH + HCl\xrightarrow{{{\rm{Anhyd}}{\rm{.ZnC}}{{\rm{l}}_2}}}$