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Question
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
- What is the nature of the oxide E2O?
- State whether element E is a metal or a non-metal.
- Give one example of an element like E.
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Solution
- The oxide E2O is basic in nature because it turns red litmus paper blue.
- The element E is a metal because Most metallic oxides are basic and form alkaline solutions when dissolved in water.
- Sodium (Na) is a perfect example. Sodium forms sodium oxide (Na2O), which dissolves in water to form sodium hydroxide (NaOH), a strong base that turns red litmus blue. Potassium (K) is also a valid example.
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