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.
An indicator is a substance which shows the presence of a chemical substance by __________ | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) Curry powder contains the pigment of curcumin, which changes from yellow at pH 7.4 to red at pH 8. (b) Red-cabbage juice, Itself purple in colour, it turns red in an acid solution, but green in a basic solution. (c) Turmeric juice is yellow in colour, remains yellow in an acidic or neutral solution but turns deep brown in a basic solution. | |||
| Right Option : D | |||
| View Explanation | |||
____________________ do not change colour in any indicator | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
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.
Eshan Arora
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
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.
Archit Segal
7thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
