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प्रश्न
Phenolphthalein is a synthetic type of indicator.
पर्याय
True
False
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उत्तर
Phenolphthalein is a synthetic type of indicator - True
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संबंधित प्रश्न
From which plant is litmus paper or litmus solution obtained?
- Moss
- Rose
- Hibiscus
- Lichen
Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?
Complete and balance the following chemical equations:
CuO (s) + HCI (aq) →
A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:
(a) Na2SO4
(b) CaSO4
(c) H2SO4
(d) K2SO4
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?
What ions are present in the solutions of following substances? (write the symbols only)
Sulphuric acid
What ions are present in the solutions of following substances? (write the symbols only)
Magnesium hydroxide
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
Acids turn blue litmus paper to ______.
Egg shell is made up of ____________.
Lime water reacts with chlorine to form:
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?
In an attempt to demonstrate electrical conductivity through an electrolyte, the apparatus setup. Which among the following statement(s) is(are) correct?
- Bulb will not glow because electrolyte is not acidic
- Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
- Bulb will not glow because circuit is incomplete
- Bulb will not glow because it depends upon the type of electrolytic solution
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.
What happens when nitric acid is added to egg shell?
Solutions of acids conduct ______.
Which acid is present in milk?
______ & ______ metals do not react with HCl or HNO3.
