Advertisements
Advertisements
प्रश्न
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
उत्तर
When plaster of Paris is mixed with water, it settles into a hard mass to form gypsum (common name). The chemical name of gypsum is calcium sulphate dihydrate. `CaSO_4. 1/2H_2O + 1 1/2 H_2O -> Ca SO_4. 2H_2O`
APPEARS IN
संबंधित प्रश्न
When acids react with metal, which gas is liberated?
Write a word equation and then a balanced equation for the reaction taking place when:
Dilute hydrochloric acid reacts with iron filings.
Complete and balance the following chemical equations:
Zn (s) + HCI (aq) →
Is PbO2 a base or not? Comment.
Answer the following question.
Identify the acid and base which form sodium hydrogen carbonate. Write the chemical equation in support of your answer. State whether this compound is acidic, basic, or neutral. Also, write its pH value.
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 substance will not give carbon dioxide on treatment with dilute acid?
Which of the following are present in a dilute aqueous solution of hydrochloric acid?
Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.
“All acids contain one or more hydrogen atoms, but not all substances containing hydrogen are acids.” Support this statement with examples.
