11th Class Chemistry The s-Block Elements

  • question_answer 89)   An element of group 2 forms covalent oxide which is amphoteric in nature and dissolves in water to give an amphoteric hydroxide. Identify the element and write chemical reactions of the hydroxide of the element with an alkali and an acid.

    Answer:

      The element is beryllium. Its oxide is \[BeO\]which is covalent in nature. It is amphoteric oxide and combines with form beryllium hydroxide which is also amphoteric in nature. \[Be{{(OH)}_{2}}+2NaOH\to N{{a}_{2}}Be{{O}_{2}}+2{{H}_{2}}O\] \[Be{{(OH)}_{2}}+2HCl\xrightarrow{{}}BeC{{l}_{2}}+2{{H}_{2}}O\]

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