Q 1: Fill in the blanks:-
1. Matter is made up of small_________
2. The forces of attraction between the particles are _______ in solids, ______ in liquids and _________ in gases.
3. __________ is the change of gaseous state directly to solid state without going through liquid state, and vice-versa.
4. Evaporation causes __________
5. Latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its ________
6. Solid, liquid and gas are called the three _______ of matter
7. The smell of perfume gradually spreads across a room due to ______
8. Rapid evaporation depends on the ______ area exposed to atmosphere
9. As the temperature of a system increases, the pressure of the gases ______
10. As the volume of a specific amount of gas decreases, it’s pressure _______
11. Gas molecules at higher temperatures have more _______ than at cooler temperatures.
12. Usually the total charge of a plasma is _______
13. The pressure inside of a sealed tube if you raise the temperature go ______
14. Forces of attraction in liquids are _______ than in solid
15. Liquids that move quickly downhill are described as having _____
16. A mixture contains more than ______ substance mixed in ______ proportion.
17. A solution is defined as a mixture that is----------
18. We can remove salts from a solution by using the process of ----------
19. A pure substance has a fixed__________ or ______ at constant temperature.
20. An element is made up of only one kind of _________.
21. Miscible liquids are separated by ________
22. Immiscible liquids are separated by using a _______
23. Alloy is a _______
24. Sublimation of camphor is a _________ change.
25. Most common chemical change we observe in our routine life is rusting of______.