Structure of Matter

Chemistry Board Question  
Chapter Two  

Structure of Matter
Short Question
1. i) What is meant by chemical combination? State the law / Write down the Laws. (DB-04, JB-03) 2
 ii) What is called the laws of chemical combination? (CtgB-05) 1
2. i) What is colloid? / What is colloid solution? (JB-01) 2
 iii) What is meant by atomic mass unit? (DB-02) 1+1=2
3. State and explain the law of gaseous volume with according to the equation H2+Cl2 = 2HCl (RB-02, DB-01, CtgB-02, DB-05) 2
4. i) What do you mean by atomic mass and gram atomic mass? (DB-00, SB-99) 2
 ii) What is meant by atomic mass and mass of one atom? (CtgB-03)pre08 2
5. Write down the limitations of Rutherfords atom model. (DB-00) 2
6. State and explain the Law of Multiple proportions. (RB-05, DB-00, JB-01, CB-04) 2
7. What is meant by Brownian movement? (DB-99, CB-03, 99, SB-04, CB-03, 99, RB-00)
8. Write down the four differences between atoms and molecules. (CB-00, 03, RB-00, 02, BB-01)JB08 2
9. i) What do you mean by atomic mass and molecular mass? (CB-00) 2
 ii) Find out the molecular mass of Ca(HCO3)2. (CtgB-05) 1
10. State the law of conservation of mass. 2
11. What is Law of constant or definite proportion? Explain it. Write the Law with example. (RB-1, JB-02) 2
12. What is the value of one a.m.u in gram? 1
 Find out the mass of one atom of Hydrogen? (RB-02) 1
13. What is diffusion? (JB-99, JB-05) 1
14. Describe an experiment regarding the process of diffusion or, Describe diffusion with a proper experiment. (DB-02) 2
15. What is meant by mole? Explain with examples. (CB-01) 2
16. i) Write the Law of reciprocal proportion. (CB-01, CtgB-05) 1
 ii) Write the Law of Reciprocal proportion and explain with example. (JB-99, CB-00) pre08 2
17. Write down the modern definition of molecular mass. (CtgB-04) 2
Broad Question
18. i) Write down the six postulates of Dalton's atomic theory. 2
 ii) Write down the postulates of Dalton's atomic theory and discus its limitation. (RB-99) 3
19. What is meant by atom? Write two difference between atoms and molecules. (DB-04) 3
20. i) Write down the six postulates of Dalton's Atomic Theory. (CB-04) 3
 ii) What are the postulates of Dalton's tomic theory? State the limitations. (DB-03, CB-04, RB-03, CB-02, CB-99) 2+1=3
21. State and explain the Law of reciprocal proportions with example. (DB-03, RB-03) 3
22. What are the Laws of chemical combination? / What is meant by Laws of chemical combination. How many they are? What are they? (DB-00, CB-01, RB-01) 3
23. What is diffusion? Explain. What is called the random movement of colloidal particles in a medium? Explain it from the Kinetic theory of molecules. 3
  Or,
Explain Brownian movement with the help of kinetic theory of molecules.
24. N2 & O2 combine to form four compound. e.g. N2O, NO, N2O3 and Nitrogen dioxide. Show this data supports which Law of chemical reaction. (BB-02) 3
25. N2 and H2 combine to form NH3 where N2=82.35%, in N2O3 N2=22.58% and in H2O2 H2=5.88% show that the data support the Law of reciprocal proportion. (SB-04) 4
26. In CS2 ; C=15.75%, in SO2, S=50% and in CO2, C=27.2%. Prove which Law of chemical combination support this data value. (SB-04) 2
27. State the Law of Indestructibility of matter or conservation of mass and describe it with an experimental proof. (CB-99, DB-02, BB-04) 4
28. State and explain the Law of reciprocal proportion. (DB-99, CB-99) 4
29. Why John Dalton is regarded as the founder of modern chemistry? What are the postulates of Dalton's atomic theory? Write down the limitations of this theory. (JB-05, CB-01, BB-03, RB-05) 1+2+1=4
30. What are atoms and molecules? Write down their differences. (RB-04) 4
Mathematical Problem
31. Elements P and Q combines together to form four different compounds. Amongst them the compositions of P are 25%, 14.28%, 10% and 7.69% respectively. Show, which Law of chemical combination is supported by the data? (DB-05, CtgB-00, SB-05) 3
32. Of the two compounds composed of nitrogen and oxygen, the amount of the mass of oxygen are 36.4% and 69.6% respectively. Show that, the data supports the Law of multiple proportions. (SB-02) 02
33. Carbon and O2 forms CO2, where O2=72.73%, in water O2=88,89% and in CH4, C=75%. Show, this data supports which Law of chemical combination. (CtgB=02) 02
34. There are two copper oxides. The amount of Oxygen in the first and second Oxides are 20.12% and 11.19% respectively. Show that these data follow the Law of Multiple Proportions. (DB-01) 3
35. Ethane, Ethylene and acetylene are formed in combination from carbon and Hydrogen. The amount of Hydrogen in these compounds are 20%, 14.28% and 7.68% respectively. Show that this data supports the Law of Multiple Proportions. (CB-05, DB-99, CB-2, RB-99) 3
36. Carbon and Oxygen combine to form CO2, in which the amount of Oxygen is 42.73%. The amount of Oxygen in water is 88.89%. In methane a compound of carbon and Hydrogen, the amount of Carbon is 75%. Show that this data supports the Law of Reciprocal Proportions. (CB-99, CB-02) 4
37. The amount of Carbon in Carbon di sulphide is 15.79, the amount of Sulphur is Sulphur di oxide is 50% and Carbon di Oxide contains 27.27% Carbon. Which Law of chemical combination is supported by this analytical data? (RB-3, BB-04, CtgB-05) 3
38. Amongst 0.20 gm, 0.27 gm and 0.475 gm oxides of a metal there contains 0.12 gm, 0.162 gm and 0.285 gm metal respectively. Show that this data supports the Law of constant or definite proportion. (RB-00) 4
39. The following data were obtained by analysis of different samples of common salt. (JB-2000) 03 Mass of Common Salt Mass of Chlorine
 (a) 2.30 gm 1.40 gm
 (b) 5.71 gm 3.47 gm
 (c) 8.19 gm 4.97 gm