Which of the following compounds gives a yellow residue when heated and also reacts with…

Chemistry JAMB 1990

Which of the following compounds gives a yellow residue when heated and also reacts with aqueous sodium hydroxide to give a white gelatinous precipitate soluble in excess sodium hydroxide solution?

  • (NH4)CO3
  • ZnCO3 checkmark
  • Al2(SO4)3
  • PbCO3

The correct answer is: B

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