Question

Choose the correct word from the bracket and fill in the blanks.

Commercial alcohol is made unfit for drinking by the addition of _________(methanol/ethanol).

Answer 1

1. Commercial alcohol is made unfit for drinking by the addition of __methanol___.
2. Denatured alcohol: Ethyl alcohol is used commercially as for drinking beverages.
3. When certain amount of some substances such Pyridine$\mathbf{\left(}{\mathbf{C}}_{\mathbf{5}}{\mathbf{H}}_{\mathbf{5}}\mathbf{N}\mathbf{\right)}$, Copper sulphate$\mathbf{\left(}{\mathbf{CuSO}}_{\mathbf{4}}\mathbf{\right)}$, and Methyl alcohol is added to Ethyl alcohol it turns the solution poisonous in nature.
4. With the $5\%$presence of Methyl alcohol$\mathbf{\left(}{\mathbf{CH}}_{\mathbf{3}}\mathbf{OH}\mathbf{\right)}$ in the solution of Ethyl alcohol$\mathbf{\left(}{\mathbf{C}}_{\mathbf{2}}{\mathbf{H}}_{\mathbf{5}}\mathbf{OH}\mathbf{\right)}$ makes it poisonous and so they are called denatured alcohol or methylated spirit is formed.
5. Hence, we conclude that commercial alcohol is made unfit for drinking by the addition of methanol.