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1. Fe(OH)₃, Cu(OH)₂, Zn(OH)₂ এবং Co(OH)₂ অধঃক্ষেপ সমূহের রং-এর ক্রম হলো-

  • A. brown, blue, white and pink
  • B. brown, blue, white and pink
  • C. brown, blue, white and pink
  • D. brown, blue, white and pink

Answer: Option A

Explanation:


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