Advertisements
Advertisements
प्रश्न
State four different properties of a compound and a mixture.
Advertisements
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
Statement given below is incorrect. Write the correct statement :
Helium gas at low pressure is used for filling electric bulbs.
What is the significance of water vapour in air?
Write ‘true’ or ‘false for the following;
The major component of air is oxygen.
State the utility of oxygen for respiration in plants
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
The diagrams below represents an experiment to show the presence of a component of air.

- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Name the following:
The product formed when phosphorus burns in oxygen.
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
List out the uses of nitrogen.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Mountaineers carry oxygen ______ with them, while climbing high mountains.
