By-product obtained by soap industry is
-
caustic soda
-
glycerol
-
naphthalene
-
caustic potash
B
Correct answer
Explanation
During saponification, glycerol is released as a byproduct when fats or oils react with alkali. Caustic soda and caustic potash are reactants consumed in the process, not byproducts. Naphthalene is unrelated to soap manufacturing.