Which substance,when added as an adulterant to ethanol used as an intoxicating drink,causes a person to lose their vision?

Write the chemical formula and draw the electron dot structure of carbon tetrachloride.

Butanone is a four-carbon compound with the functional group:

The general formula of three compounds $A, B$ and $C$ is $C_{n}H_{2n}$. $B$ has the highest boiling point and $C$ has the lowest boiling point.
$(i)$ Mention the type of compound $A, B$ and $C$.
$(ii)$ Which of these has the minimum number of carbon atoms?
$(iii)$ Name the homologous series to which $A, B$ and $C$ belong.

$(i)$ Distinguish between saturated hydrocarbons and unsaturated hydrocarbons with the help of the combustion process.
$(ii)$ Write the chemical names of $C_{4}H_{10}$ and $C_{2}H_{2}$ and draw their structures.

What conversion occurs in the formation of milk into curd?