An industrial method of preparation of m...

An industrial method of preparation of methanol is

reacting fomaldehyde with aqueous sodium hydroxide solution

reducing formaldehyde with `LiAlH_(4)`

reacting methane with steam at `900^(@)C` with a `Ni` catalyst

catalytic reduction of carbon monoxide in presence of `ZnO-Cr_(2)O_(3)`

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The correct Answer is:

At one time , most methanol was produced by the destructive distillation of wood (i.e., having wood to a high temperature in the absence of air). It was because of this method of preparation that methanol came to be called "wood alcohol" . Today, most methanol is produced by the catalytic hydrogenation of carbon monoxide. This reaction takes place under high pressure , at a temperature of `300-400^(@)C` and in the presence of `ZnO-Cr_(2)O_(3)` catalyst:
`CO + 2H_(2) underset(underset(ZNO-Cr_(2)O_(3))(200-300atm))overset(300-400^(@)C)rarr CH_(3)OH`
Note that the mixture of `CO` and `H_(2)` (synthesis gas) is produced by the action of steam on methane:
`CH_(4)+2H_(2) underset(Ni)overset(850-900^(@)C)rarrCO + 3H_(2)`

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An industrial method for preparation of methanol is:

Catalytic reduction of carbon monoxide in the presence of `ZnO-Cr_(2)O_(3)`.

By reacting methane with steam at `900^(@)C` with nickel as catalyst.

By reducing formaldehyde with `LiAIH_(4)`.

By reacting formaldehyde with aqueous sodium hydroxide solution.

An industrial method of the preparation of methanol is :

by reacting `CH_(4)` with steam at 1173K with a nickel catalyst

by reduction of HCHO with `LiAlH_(4)`

by catalytic reduction of CO in presence ZnO `-Cr_(2)O_(3)`

by reaction of HCHO with `NaOH (aq.)`

An industrial method for the preparation of methanol is

by reacting `CH_(4)` with steam at `900^(@)C` with nickel catalyst

by reduction of HCHO with `LiAlH_(4)`

by catalytic reduction of CO in presence of ZnO - `Cr_(2)O_(3)`

by reaction of HCHO with `NaOH_((aq))`.