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प्रश्न
What is the difference between an alkali and a base?
अंतर स्पष्ट करें
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उत्तर
| Alkali | Base | |
| 1. | An alkali is a basic hydroxide that, when dissolved in water, produces hydroxyl (OH−) ions, the only negatively charged ions. | A base is a chemical compound that, when reacting with a hydronium ion or H+ ions furnished by an acid, forms salt and water only. |
| 2. | All alkalis are water soluble. | Bases may or may not be water soluble. |
| 3. | All alkalis are bases | All bases are not alkalis. |
| 4. | Examples are NaOH, KOH, Ca(OH)2. | Examples are CuO, Mg(OH)2. |
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संबंधित प्रश्न
Give one example in the following case:
A hydroxide which is insoluble in water.
Give one example in the following case:
A base which does not contain a metal ion.
Why indicator does not get affected by salt?
Metal corrodes due to salts.
What are the similarities between acids and bases?
Look at figure which shows solutions taken in test tubes A, B, C and D. What colour is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help.
| Test tube | Nature of Solution | Change in colour of red litmus |
| A | Neutral | |
| B | Basic | |
| C | Acidic | |
| D | Neutral |
Water-soluble bases are called ______.
Name the base which is present in a window cleaner.
Bases ionise in water to form ______ ions.
Water-soluble bases are called ______.
