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Valency and Chemical Formula Quiz App Download - O Level Chemistry Apps (iOS & Android)

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Valency and Chemical Formula Quiz App Download & e-Book PDF - 82

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MCQ: 82

In CuO (Copper Oxide), the valency of Copper is

  1. +1
  2. +2
  3. −1
  4. −2

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Valency and Chemical Formula Apps (Android & iOS)

Valency and Chemical Formula App

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