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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
Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
(B) Lichen
(C) Rose
(D) Hibiscus
What happens when an acid reacts with a metal?
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
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 solutions of following substances? (write the symbols only)
Sulphuric acid
What is the chemical formula of baking soda?
Name the product formed when Cl2 and H2 produced during the electrolysis of brine are made to combine.
Complete and balance the following chemical equations:
`Ca(OH)_2 + Cl_2 ->`
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.
State two uses each of the following compounds:
Hydrochloric acid
When _______________ is passed through fresh lime water, it turns milky.
With the help of suitable examples explain the term neutralization and the formation of –
- acidic,
- basic and
- neutral salts
Which of the following salts does not contain any water of crystallisation?
Which of the following gives the correct increasing order of acidic strength?
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?
A sulphate salt of Group 2 element of the Periodic Table is a white, soft substance which can be moulded into different shapes by making its dough. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt. Why does it show such a behaviour? Give the reaction involved.
Vinegar is ______ in taste.
Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.
