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प्रश्न
Why is acidified water considered to be a good conductor of electricity?
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उत्तर
Hydrogen ions are created in the presence of water when an acid and water are combined. The acidified water is a good conductor of electricity because of the presence of these ions.
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संबंधित प्रश्न
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Complete and balance the following equation:
Na2O + H2O →
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
Which non-metal has been placed in the reactivity series of metals?
Name a metal which does not react with cold as well as hot water but reacts with steam.
Calcium floats over water during the reaction with water. Give reason.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
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)?
