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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
Why should curd and sour substances not be kept in brass and copper vessels?
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains ______.
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?
Name one natural source of the following acid:
Lactic acid
Complete and balance the following chemical equation:
\[\ce{CuO_{(s)} + HCl_{(aq)} ->}\]
What happens when an acid reacts with a base? Explain by taking the example of hydrochloric acid and sodium hydroxide. Give equation of the chemical reaction which takes place. What is the special name of such a reaction?
What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.
Which element is common to all acids?
Write a balanced chemical equation of the reaction which takes place.
With which substance should chlorine be treated to get bleaching powder?
Complete and balance the following chemical equation:
\[\ce{Ca(OH)2 + Cl2 ->}\]
What happens when a solution of sodium hydrogencarbonate is heated? Write equation of the reaction involved.
What is the chemical formula of bleaching powder?
Explain the following:
Lead carbonate does not react with dilute HCl.
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
To protect tooth decay, we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is
Which of the following is used for dissolution of gold?
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.
______ change the colour of the indicators.
The taste of acid is ______.
