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AP EAMCET202421 May 2024Evening ShiftChemistrys Block ElementsActual

Which one of the following statements is NOT correct about the compounds of alkaline earth metals?

Options

  1. ABasic nature increases from Mg ( OH )₂ to Ba ( OH )₂
  2. BThermal stability decreases from BeCO ₃ to BaCO ₃
  3. CSolubility of sulphates in water decreases from BeSO ₄ to BaSO ₄
  4. DNitrates of these on heating give oxides

Correct answer

B. Thermal stability decreases from BeCO ₃ to BaCO ₃

Step-by-step solution

Be ( OH )₂ is amphoteric, but the hydroxides of Mg , Ca , Sr and Ba are basic. The strength increases from Mg to Ba . Carbonates of group 2 elements become more thermally stable down the group. The larger compounds require more heat than the lighter compounds in order to decompose. array lll BeCO ₃ & MgCO ₃ CaCO ₃ SrCO ₃ & BaCO ₃ 100^ C 540^ C & 900^ C & 1290^ C 1360^ C array The solubility of the sulphates in water decreases down the group. Be Mg Ca Sr Ba . The higher solubilities of BeSO ₄ and MgSO ₄ have high en

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