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प्रश्न
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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उत्तर
- 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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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
Write the chemical reaction when iron reacts with dilute H2SO4.
Differentiate between metals and non-metals on the basis of their chemical properties.
What name is given to those metal oxides which show basic as well as acidic behaviour?
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Complete and balance the following equation:
\[\ce{Na2O + H2O ->}\]
Which of the following elements would yield an acidic oxide?
Na, S, C, K, H
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Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
Name one metal more reactive than hydrogen.
Name one metal which displaces copper from copper sulphate solution.
The elements whose oxides can turn phenolphthalein solution pink are ______.
One of the following is not a neutral oxide. This is:
An acidic oxide is produced by the element ______.
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be ______.
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be ______.
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It does not react with any physical state of water.
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Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
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