Chlorine reacts with saturated hydrocarbons at room temperature in the :

What is the molecular formula of formalin?

Carbon exists in the atmosphere in the form of

Write true or false for the following statement:
Saturated hydrocarbons will generally give a clean flame,while unsaturated carbon compounds will give a yellow flame with lots of black smoke.

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.

Define homologous series of organic compounds. Mention any two characteristics of homologous series.