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 | |||
An indicator is a substance which shows the presence of a chemical substance by __________ | |||
| Right Option : A | |||
| 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 | |||
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8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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Om Umang
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Aman Kumar Shrivastava
10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
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Manish Kumar
10thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
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Manish Kumar
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Cheshta
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Ayan Ghosh
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7thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
