Which of the following represents a saponification reaction?

An organic compound $A$ on heating with concentrated $H_2SO_4$ forms a compound $B$, which on addition of one mole of hydrogen in the presence of $Ni$ forms a compound $C$. One mole of compound $C$ on combustion forms two moles of $CO_2$ and $3$ moles of $H_2O$. Identify the compounds $A$, $B$, and $C$ and write the chemical equations of the reactions involved.

Look at the figure and answer the following questions:
$(a)$ What change would you observe in the calcium hydroxide solution taken in tube $B$?
$(b)$ Write the chemical reactions involved in test tubes $A$ and $B$ respectively.

The correct electron dot structure of a water molecule is:

Which of the following is the reaction occurring between alcohol and carboxylic acid in the presence of concentrated $H_{2}SO_{4}$?

Which of the following compounds is obtained by the fermentation reaction of molasses?