Chemical Engineering
Q Portland cement consists mainly of__________________?
  • A A. Cao & sio2
  • B B. Sio2 & al2o3
  • C C. Cao & al2o3
  • D D. Cao & fe2o3
Previous Fluorescent dyes are added in detergents to____________…
Next Alkylbenzene sulfonate (ABS) is a____________________?
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