Advertisements
Advertisements
प्रश्न
State four different properties of a compound and a mixture.
उत्तर
| Property | Compound | Mixture |
| Composition | Fixed proportion of elements combined chemically. | Variable proportion of substances physically combined. |
| Properties | Properties are different from the constituent elements. | Properties are a combination of those of the components. |
| Separation | Cannot be separated by physical methods, only by chemical methods. | Can be separated by physical methods. |
| Energy Change | Formation involves a chemical reaction with energy changes. | Formation does not involve a chemical reaction or energy change. |
APPEARS IN
संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
Tick (√ ) the most appropriate answer.
Magnesium burns with a dazzling white flame to form magnesium oxide, a powdery mass. The colour of magnesium oxide is :
Write ‘true’ or ‘false for the following;
The major component of air is oxygen.
Give word equation for the following conversion:
Nitric acid to soluble nitrates in the soil
Inhaled air contains a large amount of carbon-di-oxide.
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
List out the uses of nitrogen.
Mountaineers carry oxygen cylinders with them because
Explain the following observations very briefly
An empty glass in fact is not empty.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere
nitrogen
