Chemical Industries - Online Mcqs Test - Chemistry 9th (Part II)

Chemistry IX Class MCQs – Chemical Industries – 9th

Chemical Industries – Online Mcqs Test (18 Mcqs)

1/18
jQuizMe
Tannic acid and gallic acid are used in the preparation of:
  1. Red ink
  2. Marking ink
  3. Printing ink
  4. Blue black ink



Chemical Industries
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