Chemistry
Grade-10
Easy
Question
The indicators which remain yellow when added to the base and become red in color when added to acid is:
- Methyl orange
- Phenolphthalein
- China rose
- Both a and b
Hint:
The indicator which remains yellow when added to the base and becomes red in color when added to acid is methyl orange.
The correct answer is: Methyl orange
- Methyl orange is an orange dye that holds its color even when exposed to a neutral medium.
- The indicator turns red in an acidic medium and yellow in a basic medium.
- Chemical processes are used in the laboratory to create phenolphthalein and methyl orange.
Related Questions to study
Chemistry
The indicator which is prepared from man-made substances in the lab are called:
The indicator which is prepared from man-made substances in the lab are called:
ChemistryGrade-10
Chemistry
Based on the following picture, what will change the color of blue litmus paper to a red one?
Based on the following picture, what will change the color of blue litmus paper to a red one?
ChemistryGrade-10
Chemistry
A sample solution is present in the container (X). A filter paper is dipped inside this solution and then the lime solution. After dipping in the lime water, the color of the filter paper changes to reddish-brown. What will be the sample solution present in container (X)?
A sample solution is present in the container (X). A filter paper is dipped inside this solution and then the lime solution. After dipping in the lime water, the color of the filter paper changes to reddish-brown. What will be the sample solution present in container (X)?
ChemistryGrade-10
Chemistry
A neutral solution turns a blue litmus paper into:
A neutral solution turns a blue litmus paper into:
ChemistryGrade-10
Chemistry
When turmeric is added to the hydrochloric acid solution, what change will occur here?
When turmeric is added to the hydrochloric acid solution, what change will occur here?
ChemistryGrade-10
Chemistry
Substances like dark chocolate that have a bitter taste, usually indicates that it would be classified as a
Substances like dark chocolate that have a bitter taste, usually indicates that it would be classified as a
ChemistryGrade-10
Chemistry
Substances that taste sour like lemon juice tend to be classified as
Substances that taste sour like lemon juice tend to be classified as
ChemistryGrade-10
Chemistry
A chemical has a pH = 6. It would be best described as
A chemical has a pH = 6. It would be best described as
ChemistryGrade-10
Chemistry
A solution has a pH of 7.0. What would happen to the pH if H+ ions were added?
A solution has a pH of 7.0. What would happen to the pH if H+ ions were added?
ChemistryGrade-10
Chemistry
A pH of 3 is how many times more acidic than a pH of 5?
A pH of 3 is how many times more acidic than a pH of 5?
ChemistryGrade-10
Chemistry
In a test of pH levels, baking soda has a pH of 9 and bleach has a pH of 12. What is true about their relationship?
In a test of pH levels, baking soda has a pH of 9 and bleach has a pH of 12. What is true about their relationship?
ChemistryGrade-10
Chemistry
Which of the following analogy is incorrect?
Which of the following analogy is incorrect?
ChemistryGrade-10
Chemistry
Identify the incorrect statements from the following.
I. Aluminium Hydroxide is a strong base.
II. Magnesium reacts with cold water to give magnesium oxides with the liberation of hydrogen gas.
III. Boric acid is an excellent cleaner for all worms and insects in the food grains.
IV. Sodium sulphate is the salt formed by sodium hydroxide and sulphuric acid.
Identify the incorrect statements from the following.
I. Aluminium Hydroxide is a strong base.
II. Magnesium reacts with cold water to give magnesium oxides with the liberation of hydrogen gas.
III. Boric acid is an excellent cleaner for all worms and insects in the food grains.
IV. Sodium sulphate is the salt formed by sodium hydroxide and sulphuric acid.
ChemistryGrade-10
Chemistry
When a superheated stream passes through a metal M, a metal oxide is formed and when the red litmus paper is dipped inside the solution of this metal oxide, it changes to blue colour.
Identify the metal “M”.
When a superheated stream passes through a metal M, a metal oxide is formed and when the red litmus paper is dipped inside the solution of this metal oxide, it changes to blue colour.
Identify the metal “M”.
ChemistryGrade-10
Chemistry
Identify the alkalis from the following.
Identify the alkalis from the following.
ChemistryGrade-10
