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प्रश्न
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
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उत्तर
| Column A | Answers | ||
| i | eosin | 2 | synthetic indicator |
| ii | oxidation | 1 | losing hydrogen |
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संबंधित प्रश्न
What do we observe on pouring acetic acid on red and blue litmus papers?
(A) Red litmus remains red and blue litmus turns red.
(B) Red litmus turns blue and blue litmus remains blue.
(C) Red litmus turns blue and blue litmus turns red.
(D) Red litmus becomes colourless and blue litmus remains blue.
When acids react with metal, which gas is liberated?
Complete and balance the following chemical equation:
\[\ce{Na2CO3_{(s)} + HCl_{(aq)} ->}\]
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
- Predict the new compound formed which imparts a blue-green colour to solution.
- Write a balanced chemical equation of the reaction which takes place.
- On the basis of the above reaction, what can you say about the nature of copper oxide?
A substance X which is used as an antacid reacts with dilute hydrochloric acid to produce a gas Y which is used in one type of fire-extinguisher. Name the substance X and gas Y. Write a balanced equation for the chemical reaction which takes place.
What ions are present in the solution of the following substance? (write the symbols only)
Magnesium hydroxide
Define an acid.
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
What is the chemical formula of bleaching powder?
State one use of bleaching powder (other than bleaching).
Choose the correct alternative and rewrite the following sentence.
Phenolphthalein is ___________ type of indicator.
When _______________ is passed through fresh lime water, it turns milky.
Lime water reacts with chlorine to form:
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
- The temperature of the solution increases
- The temperature of the solution decreases
- The temperature of the solution remains the same
- Salt formation takes place
Calcium phosphate is present in tooth enamel. Its nature is
Which of the following statements is true for acids?
A salt may be ______.
Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.
What is the correct procedure for mixing acid and water? Why?
What property do acids and bases have in common? Explain it with an example.
