Which of the following raw materials are used by chemical based industries?
Answer & explanation
Correct answer: option 4
The correct answer is Option 4: All of the above
NCERT: Chemical based Industries: Such industries use natural chemical minerals, e.g. mineral-oil (petroleum) is used in petro chemical industry. Salts, sulphur and potash industries also use natural minerals. Chemical industries are also based on raw materials obtained from wood and coal. Synthetic fibre, plastic, etc. are other examples of chemical based industries.