Methyl Orange and Phenolphthalein Indicators
Methyl Orange and Phenolphthalein Indicators
Phenolphthalein:
It is a colourless compound. An alcoholic solution of phenolphthalein is used as an indicator. It is colourless in an acidic solution, but becomes pink (red) in basic solution. It is used as indicator in different acid-base iterations where its colour get changed due presence of base.
Methyl Orange:
A very small amount of solid methyl orange is dissolved in hot water and filtered. The filtrate is used as an indicator.
Which of the following are correct : (a) Phenolphthalein is colourless in an acidic solution. (b) Methyl orange turns red in acid solutions and yellow in basic solutions. (c) Phenolphthalein turns red in acid solutions and pink in basic solutions. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following solutions will turn methyl orange pink or red? | |||
| Right Option : C | |||
| View Explanation | |||
Among the following which substance turns phenolphthalein to pink? | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
About 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.
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