Change in Colour
Change in Colour
Change in Colour:
In some chemical reactions, a change in colour is observed. The chemical reaction between citric acid and purple colored potassium permanganate solution is characterized by a change in color from purple to colorless. Take some dilute potassium permanganate solution in a test tube. It has purple colour. Add some lemon juice (it contains citric acid) to it with the help of a dropper and shake the test tube. The purple color of potassium permanganate solution goes on fading and ultimately it becomes colorless.
Which of the following are correct : (a) Potassium iodide is a colourless solution. (b) When iron is left exposed to air for a long lime, the outer surface of iron gets covered with a brown coating of rust. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) The chemical reaction between citric acid and purple colored potassium permanganate solution is characterized by a change in color from purple to colorless. (b) When chlorine water is added to a solution of potassium iodide, a brown solution is obtained. (c) When iron is left exposed to air for a long lime, the outer surface of iron gets covered with a brown coating of rust. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Potassium permanganate solution is of purple colour. (b) Chlorine water is of yellow colour. (c) Potassium iodide is a yellow solution. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
My 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
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thOne 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
10thI 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
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
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy 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
7thAbhyas 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.
Om Umang
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
7thIt 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
