Preparation Method of Alkenes

Which of the following compound is formed on acid dehydration of ethanol?

2-hexyne gives trans-2-hexene on treatment with –

Hydrogenation of the adjoining compound in the presence of poisoned palladium catalyst gives –

The reagent(s) for the following conversion,

is/are

Cyclohexene is best prepared from cyclohexanol by which of the following?

A solution of $20.2 g$ of $1,2$ -dibromopropane in $MeOH$ upon heating with excess $Zn$ produces $3.58 g$ of an unsaturated compound $X .$ The yield ($\%$) of $X$ is closest to [Atomic weight of Br is $80$]

The compound that undergoes dehydration most readily is

From which one of the following both ethylene and acetylene could be prepared in a single step reaction?

The product obtained on elimination of bromine from 2-bromobutane is:

Which of the following methods cannot be considered suitable for preparing ether?

The best reagent for the preparation of cyclohexene from cyclohexanol is

Which reagent(s) is/are used to carry out the following conversion?

When $3,3 -\mathrm{dimethyl}-2-\mathrm{butanol}$is heated with ${\mathrm{H}}_2{\mathrm{SO}}_4,$ what will be the product obtained?

Dehydration of alcohols by concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ takes place according to the following steps:

 The slowest and fastest steps in the above reaction are:

In petrochemical industry, alcohols are directly converted to gasoline by passing over heated

Optically active was found to have lost its optical activity after standing in water containing a few drops of acids, mainly due to the formation of

The reagent X used for the following reaction is

Compound 'X' on Heating with Zn dust gives compound 'Y' which on treatment with $O_3$ followed by reaction with Zn dust gives propionaldehyde. The structure of 'X' is

The product that should be formed in the reaction is:

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\genfrac{}{}{0pt}{}{\stackrel{\left(\mathrm{i}\right)\mathrm{ }{\mathrm{H}}_2, {\mathrm{lindlar}}^{\mathrm{\prime }}\mathrm{s}\mathrm{ }\mathrm{catalyst}}{\to }}{\left(\mathrm{ii}\right) {\mathrm{Br}}_2/{\mathrm{CCl}}_4}\mathrm{Product}$

How many structures of $X$ is possible?