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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
When acids react with metal, which gas is liberated?
Why does an aqueous solution of an acid conduct electricity?
How is the concentration of hydroxide ions (OH−) affected when excess base is dissolved in a solution of sodium hydroxide?
Complete and balance the followingchemicalequations:
NaHCO3 (S) + HCI (aq) →
What happens when an acid reacts with a metal hydrogencarbonate? Write equation of the reaction which takes place.
Write a balanced chemical equation of the reaction which takes place.
What ions are present in the solutions of following substances? (write the symbols only)
Magnesium hydroxide
Write the chemical formula of sodium carbonate decahydrate.
What would be the colour of litmus in a solution of sodium carbonate?
What is the chemical name of bleaching powder?
The table given below shows the reaction of a few elements with acids and bases to evolve Hydrogen gas.
| Element | Acid | Base |
| A |
✗
|
✗ |
| B |
✓
|
✓ |
| C | ✓ | ✗ |
| D | ✓ | ✓ |
Which of these elements form amphoteric oxides?
Which of the following gives the correct increasing order of acidic strength?
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
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.
______ change the colour of the indicators.
Write notes on the properties of acids.
A substance 'X' is used as a building material and is insoluble in water. When it reacts with dil. HCl, it produces a gas which turns lime water milky.
- Write the chemical name and formula of 'X'.
- Write chemical equations for the chemical reactions involved in the above statements.
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?
