Advertisements
Advertisements
प्रश्न
What is the difference between an alkali and a base?
फरक स्पष्ट करा
Advertisements
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. |
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
संबंधित प्रश्न
Give one example in the following case:
A basic oxide which is soluble in water.
Distinguish between acid and alkali (other than indicators).
Main constituent of base is ______.
Write the balanced equation for the reaction of:
A named acid and a named alkali.
Wasp sting contains _______.
What are the similarities between acids and bases?
Match the important chemicals given in Column (A) with the chemical formulae given in Column (B)
| Column (A) | Column (B) |
| (a) Plaster of Paris | Ca(OH)2 |
| (b) Gypsum | CaSO4. 1/2 H2O |
| (c) Bleaching Powder | CaSO4.2H7O |
| (d) Slaked Lime | CaOCl2 |
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?
Water-soluble bases are called ______.
All bases are alkalis but all alkalis are not bases.
