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प्रश्न
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
(B) Lichen
(C) Rose
(D) Hibiscus
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उत्तर
Lichen
APPEARS IN
संबंधित प्रश्न
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains ______.
Complete and balance the following chemical equations:
Zn (s) + HCI (aq) →
What happens when an acid reacts with a base?
What ions are present in the solutions of following substances? (write the symbols only)
Sulphuric 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.
Write the chemical equation of the reaction of metal X with (i) hydrochloric acid, and (ii) sodium hydroxide solution.
Write the chemical formula of soda ash?
Write the chemical formula of sodium carbonate decahydrate.
What is the chemical name of bleaching powder?
Write any four physical properties of acids.
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?
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?
What happens when nitric acid is added to egg shell?
In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if following changes are made?
- In place of zinc granules, same amount of zinc dust is taken in the test tube
- Instead of dilute sulphuric acid, dilute hydrochloric acid is taken
- In place of zinc, copper turnings are taken
- Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.
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.
Solutions of acids conduct ______.
Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.
Consider the following salt:
YCl
What would be the pH of the solution if, in YCl, Y is sodium? Give a reason for your answer.
The metal that will not produce hydrogen gas when reacted with dilute acids.
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
