Multiple choice Among the following, --------------------- is commonly used as corrosion inhibitor. Benzothiophene Benzotriazole Benzoxazole Cocaine Reveal answer Fill a bubble to check yourself B Correct answer Explanation Benzotriazole is a heterocyclic compound. It is commonly used as a corrosion inhibitor. It is a colourless solid that is soluble in polar solvents, including water. Benzotriazoles are also a class of compounds containing the benzotriazole skeleton.