Question

What is the formula of Rectified spirit?

Answer 1

To keep away from misuse of alcohol meant for industries for consuming purpose, it is made unfit by combining methanol, copper sulphate, and pyridine. The process is called denaturation of alcohol and the alcohol obtained is called denatured alcohol.
Ethyl alcohol is nontoxic but produces physiological effects disturbing brain activity on drinking it.

Complete answer: Formula of rectified spirit is ${C_2}{H_5}OH$.
Ethanol with $95\%$ purity is called rectified spirit. It contains $95.57\%$ ethyl alcohol and $4.43\%$ water.
Rectified spirit is a powerful stimulant. Ethyl alcohol with low amount of water is rectified spirit
Rectified spirit is highly concentrated ethanol, in other words it can be said that rectified spirit is highly concentrated ethanol. Rectified spirit can be purified by repeated distillation known as rectification.
Rectified spirit can be converted into absolute alcohol by distilling, it is done with a substance that is hygroscopic in nature i.e. $CaO$ .

Note:
Methanol or methyl alcohol is also known as wood spirit as it was originally prepared by destructive distillation of woods.
Ethanol is also known as grain alcohol as it can be prepared from starchy grains. Ethanol is also prepared industrially from starchy materials like potato, barley, yam, etc..
Absolute alcohol is $100\%$ pure ethanol.
Liquors used for drinking purposes contain alcohol as the principal intoxicating agent. There are mainly two types of beverages, undistilled beverages are prepared from other fruit juices and they are called wines.
The liquors acquired through distillation have higher alcoholic contents and they are referred to as whisky, rum, brandy etc.