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प्रश्न
Indicator is a substance which shows different colours in acidic and basic solutions.
विकल्प
True
False
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उत्तर
This statement is True.
Explanation:
An indicator is a substance that changes colour when added to acidic or basic solutions, allowing us to determine the pH level of the solution.
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संबंधित प्रश्न
What colour does the following indicator turn when added to a base or alkali (such as sodium hydroxide)?
Litmus
Those substances whose smell (or odour) changes in acidic or basic solutions are called ______ indicators.
Why does tooth decay start when the pH of mouth is lower than 5.5?
What is the name of the indicator which can be used for testing the pH of a solution?
Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why?
Name two common antacids.
The daffodil plants grow best in a soil having a pH range of 6.0 to 6.5. If the soil in a garden has a pH of 4.5, which substance needs to be added to the soil in order to grow daffodils?
Here are some results of solutions tested with universal indicator paper:
| Sulphuric acid | : | Red |
| Metal polish | : | Dark blue |
| Washing-up liquid | : | Yellow |
| Milk of magnesia | : | Light blue |
| Oven cleaner | : | Purple |
| Car battery acid | : | Pink |
Arrange the solutions in order of their increasing pH values (starting with the one with the lowest pH).
In acidic solution, the colour of the hibiscus indicator paper will change to _____.
Lemon juice will turn ______.
