Monday, October 5, 2009

States of Matter and Changes in Matter

Chemistry Board Question for S.S.C
Chapter One


States of Matter and Changes in Matter Short Question.
1. What is sublimation? Write with examples. (CB-5, DB-2000, 04, JB-03, CB-02, 04) 2
2. What do you mean by melting point and boiling point of a substance? (DB-03) 2
3. What is metalloids? State its two examples. (DB-02, JB-02, RB-99) 1
4. Why does the same substance exists in shows different states at different temperature? (DB-02, JB-99, 02) 2
5. Explain what type of change occurs when candle is burnt. (DB-01) 2
6. What do you mean by intermolecular force? (RB-99, CB-2000, JB-05, CtgB-05) 1
7. What do you mean by metal and non-metal? State two examples for each of them. (CB-2000, RB-2000) 2
8. i) What is homogeneous mixture? Give example. (CB-5, CtgB-05) 1
 ii) Write down four differences between a mixture and compound. (JB-04) 2
9. What is pure substance and combustion? Give two examples for each of them. (combustion means burning) (JB-03, CtgB-05) 2
10. State the type of the following change: (JB-03) 13=3
 i) When a piece of iron is converted to a magnet.
 ii) When photographic plate is exposed to light.
 iii) When steam is passed over red hot iron bar.
 iv) When iron piece / articles rusted. (DB-00)
11. What is the relation between melting and boiling point with that of intermolecular force? (JB-02) 2
12. i) What happens when electricity is passed through the acidified water? State the type of change. (JB-1) 2
 ii) Write down the names of different states of matter. What is intermolecular force? (RB-99) 2
13. State the type of change / What type of change will occur when rust is formed on iron substances? 2
14. Show that sugar solution is a homogeneous mixture? (CB-04) 2
15. Discuss with example the physical and chemical changes in matter. (JB-99) 2
16. Discuss saturated and unsaturated solution with example. (RB-01, CB-00, DB-99, RB-02) 2
Broad Question
17. Write down the names of the different classification of matter. Why does the same matter change its state with the change of temperature. (RB-99, CB-02) 1+2=3
18. What is physical and chemical change? State six / four points of difference between them. (BB-05, RB-05, DB-05, DB-99, CB-01 JB-08) 1+2=3
19. Magnesium on burning increases its mass but candle on burning decreases its mass Explain. (JB-03) 03
20. Discuss saturated and unsaturated mixture with example. (BB-01, CB-00, DB-99) 04
21. What is intermolecular force? Why the states of matter of a same compound changes with the change of temperature. (CB-02) 03
22. Explain the mechanism of electrolysis of acidified water. (CB-5) 03


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