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प्रश्न
Why indicator does not get affected by salt?
उत्तर
Indicators do not get affected by salts because salts are neutral in nature. Indicators work only with acidic and basic substances.
For example:
| Indicator | Acidic substance | Basic substance |
| Phenolphthalein | colourless | turns pink |
| Methyl orange | turns red | turns yellow |
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 is not an alkali.
State the term defined by the following sentence:
A soluble base.
Write any four uses of bases.
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 |
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 |
All bases are alkalis but all alkalis are not bases.
Al(OH)3 & Zn(OH)2 are not alkalis.
One of the events that does not occur during photosynthesis is ______.
A small amount of copper oxide was taken in a beaker and dilute hydrochloric acid was added with continuous stirring of the solution. Name the compound formed and state the colour of its solution. Write the balanced chemical equation for the reaction that occurs. Based on the reaction, state the nature (acidic/basic) of copper oxide.
