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Question
Choose the correct alternative and rewrite the following sentence.
Phenolphthalein is ___________ type of indicator.
Options
Natural Indicator
Universal Indicator
Synthetic Indicator
None of the above.
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Solution
Synthetic Indicator
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RELATED QUESTIONS
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
Write a word equation and then a balanced equation for the reaction taking place when:
Dilute sulphuric acid reacts with zinc granules.
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. In which test tube will the fizzing occur more vigorously, and why?
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
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(C) Rose
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What happens when an acid reacts with a metal hydrogencarbonate? Write equation of the reaction which takes place.
A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains ______.
Wasp stings can be treated with ______.
Complete and balance the following chemical equation:
\[\ce{Ca(OH)2 + Cl2 ->}\]
State two uses of the following compound:
Hydrochloric acid
Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct:
(A) I, and II
(B) II and III
(C) III and IV
(D) I and IV
Write any four physical properties of acids.
Acids turn blue litmus paper to ______.
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
Name the acid present in ant sting and give its chemical formula. Also give the common method to get relief from the discomfort caused by the ant sting.
What happens when nitric acid is added to egg shell?
What are strong and weak acids? In the following list of acids, separate strong acids from weak acids.
Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.
In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if following changes are made?
- In place of zinc granules, same amount of zinc dust is taken in the test tube
- Instead of dilute sulphuric acid, dilute hydrochloric acid is taken
- In place of zinc, copper turnings are taken
- Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.
A salt may be ______.
What property do acids and bases have in common? Explain it with an example.
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
