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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
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains ______.
Write a word equation and then a balanced equation for the reaction taking place when:
Dilute hydrochloric acid reacts with iron filings.
Complete and balance the following chemical equation:
\[\ce{CuO_{(s)} + HCl_{(aq)} ->}\]
A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains ______.
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?
Define an acid.
Hydrochloric acid reacts with a metal X to form a gas Y which burns with a ‘pop’ sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
- Name X and Y.
- Write the chemical equation of the reaction of metal X with
- hydrochloric acid, and
- sodium hydroxide solution.
Write the chemical formula of soda ash.
Write the chemical formula of sodium carbonate decahydrate.
With which substance should chlorine be treated to get bleaching powder?
State one use of bleaching powder (other than bleaching).
What does a soda-acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labelled diagram.
Magnesium hydroxides are used for treating _______
Calcium phosphate is present in tooth enamel. Its nature is
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
Which of the following statements is not correct?
Consider the following salt:
\[\ce{ZCO3}\]
What would be the change in colour in blue litmus if \[\ce{ZCO3}\] is added to it and Z is potassium?
The metal that will not produce hydrogen gas when reacted with dilute acids.
