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Which one of the following groups of elements forms strongest bases?

Correct answer: D. IA

  • A. IVA
  • B. IIIA
  • C. IIA
  • D. IA

Explanation

Group IA elements, also known as alkali metals are the most reactive elements as they have only one valence shell electron. They can donate this electron willingly and can make strong bases like NaOH, KOH, CsOH etc. Group IIA make strong bases, but not as strong as group IA. Group IIIA make amphoteric oxides and hydroxides - meaning they can act as both acids and bases. Group IVA do not make bases.

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About Chemical Equilibrium

Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.

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