The structural formula of ethyne is:

Mineral acids are stronger acids than carboxylic acids because:
$(i)$ Mineral acids are completely ionised.
$(ii)$ Carboxylic acids are completely ionised.
$(iii)$ Mineral acids are partially ionised.
$(iv)$ Carboxylic acids are partially ionised.

$(a)$ Why is hard water not suitable for washing clothes with soap?
$(b)$ Why does micelle formation take place when soap is added to water?
$(c)$ What is saponification?

Which functional group is present in alcohol?

What is the percentage of sulfur used in vulcanized rubber for battery casings (in $\%$)?

What is formed when methanol is oxidized in the presence of $Ag_{2}O$ at an appropriate temperature?