chemistry scheme of evaluation viii std
DESCRIPTION
VIII StdTRANSCRIPT
NARAYANA e-Techno SchoolsKarnataka, India
Class :VIIISub: Physical Sciences
SCHEME OF EVALUATION
SUMMATIVE ASSESSMENT -1
Exam Date:11.10.12Max marks: 80Time: 3.00 hrs
Section A
I. Answer the following questions in one sentence. (4X1M=4M)
1.
2.
3. What are the physical properties of metals?
Scheme: a. per property: ½ mark
b. minimum 2 properties.
4. Describe the uses of coke.
Scheme: a. per use: ½ mark
b. minimum 2 uses.
II. Answer the following Questions (9X2M=18M)
5.
6.
7.
8.
9.
10. Describe how coal is formed from dead vegetation. What is this process
called?
Scheme: a. Brief note on Process: 1mark
b. process name: 1mark
11. Explain the process of formation of petroleum.
Scheme: a. Brief note on the process: 2 marks
12. What happens when dilute sulphuric acid is poured on a copper plate?
Scheme: a. Explanation: 1mark
b. Equation: 1mark
13. Explain why copper cannot displace zinc from its salt solution.
Scheme: a. Reason: 1mark
b. Equation: 1mark
III. Answer the following Questions (9X3M=27M)
14.
15.
16.
17.
18. Why sodium and potassium are stored in kerosene.
Scheme: a. Explanation: 3marks
19. What are the advantages of using CNG and LPG as fuels?
Scheme: a. minimum three advantages 3marks
b. per advantage: 1mark
20. Define displacement reaction with an example.
Scheme: a. Definition: 1½ mark.
b. Example: 1½ mark.
21. Discuss about the chemical properties of metals.
Scheme: a. Reaction with oxygen: 1mark
b. Reaction with water : 1mark
c. Reaction with acids& bases: 1mark
22. Explain why fossils fuels are exhaustible natural resources.
Scheme: a. Reason: 2marks
b. Example for fossil fuels: 1mark
IV. Answer the following Questions (3X5M=15M)
23.
24.
25. Write a note on the uses of metals and non metals.
Scheme: a. Two uses of metals: 2marks.
b. Two uses of non metals: 2marks.
c. One example for each: 1mark.
Section B
V. Multiple choice questions. (16X1M=16M)
26.
27.
28.
29.
30.
31.
32.
33.
34. Fossils fuels are
(a)Coal (b) Petrol (c) Natural Gas (d) All the above
35. Least polluting fuel for vehicles is
(a)Tar (b) Kerosene (c) CNG (d)Crude Oil
36. Most purest form of carbon is
(a)Coke (b) Tar (c) Petrol (d) Kerosene
37. Metals react with acids to produce
(a)N2 (b) CO2 (c) H2 (d)Cl2
38. Which of the following can be beaten into thin sheets?
(a)Phosphorous (b) Zinc (c) Sulphur (d) Oxygen
39. Metals are
(a)Ductile (b) Malleable (c) Amphoteric (d)Both 1 & 2
40. Metallic oxides are _________ in nature.
(a)Acidic (b) Basic (c) Amphoteric (d)All
41. Which of the following metal is used in Thermometers?
(a)Gold (b)Mercury (c)Aluminium (d)Copper