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प्रश्न
Wasp sting contains _______.
रिकाम्या जागा भरा
उत्तर
Wasp sting contains alkaline substance.
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संबंधित प्रश्न
Give one example in the following case:
A basic oxide which is insoluble in water.
Metal corrodes due to salts.
All bases are alkalis.
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 |
Look at Figure 5.1 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? The 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 |
Sodium carbonate is commercially called ______.
Match the following:
| 1. | Wasp sting | a. | Milk of magnesia |
| 2. | Common salt | b. | Acetic acid |
| 3. | Organic acid | c. | Sodium chloride |
| 4. | Antacid | d. | Vinegar |
Which of the following pairs are weak bases?
______ are bitter in taste.
The nature of toothpaste commonly used is ______ in nature.
