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प्रश्न
Give one example in the following case:
A hydroxide which is insoluble in water.
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उत्तर १
Copper hydroxide
उत्तर २
Aluminium hydroxide [Al(OH3)]
संबंधित प्रश्न
Salts are neutral.
Write the balanced equation for the reaction of:
A named acid and a named alkali.
State the term defined by the following sentence:
A soluble base.
Bases are soapy to touch when they are dry.
All bases are alkalis.
State whether the following statement is true or false. Correct the false statement.
Lime water turns red litmus blue.
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 |
Phenolphthalein gives ______ colour with lime water.
Match the following:
| 1. | Sulphuric acid | a. | Weak base |
| 2. | Sodium hydroxide | b. | Strong acid |
| 3. | Acetic acid | c. | Strong base |
| 4. | Ammonium hydroxide | d. | Weak acid |
What is the role of toothpaste in the prevention of tooth decay?
