Indicators
Indicators
Indicators:
Indicators are substances which show a change in colour when brought in contact with acids and bases. The solutions that do not show change in colour in any indicator are neither acidic nor basic and are called neutral substances. Eg: water, sodium chloride, sugar etc. the indicator so chosen that it gives a different colour for different pH values. This paper is called pH paper.
|
Indicator |
Acid |
Base |
|
Blue litmus paper |
Red |
Blue |
|
Red litmus paper |
Red |
Blue |
|
Phenolphthalein |
Colour less |
Pink |
|
Methyl orange |
Red |
yellow |
Household Indicators:
(i) Turmeric juice: It is yellow in colour. It remains yellow in an acidic or neutral solution but turns deep brown in a basic solution.
Which of the following are correct : (a) Indicators are substances which show a change in colour when brought in contact with acids and bases. (b) The solutions that do not show change in colour in any indicator are neither acidic nor basic and are called neutral substances. (c) Acid turn blue litmus paper into red, whereas base shows no effect on blue litmus paper. | |||
| Right Option : D | |||
| View Explanation | |||
The solutions that do not show change in colour in any indicator are neither acidic nor basic and are called ____________________ . | |||
| Right Option : C | |||
| View Explanation | |||
____________________ do not change colour in any indicator | |||
| Right Option : C | |||
| View Explanation | |||
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It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
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8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
