(Hindi & English Version)
Time : 3 Hours Maximum Marks : 75
Note :
(i) All questions are compulsory.
(ii) Internal options are given in Question Nos. 9, 11, 16, 17,
19, 21 and 22.
(iii) Answer Question Nos. 1 to 6 in about 30 words each.
(iv) Answer Question Nos. 7 to 12 in about 50 words each.
(v) Answer Question Nos. 13 to 17 in about 75 words each.
(vi) Answer Question Nos. 18 to 22 in about 150 words each.
(vii) Draw neat and clean labelled diagrams wherever required.
(viii) Marks of each question are indicated against it.
1. What are green house gases ? 2
2. Why is L.P.G. a good fuel ? 2
3. What is the power house of the cell ? 2
4. Write uses of Solar Cell. 2
5. What is sexual reproduction ? 2
6. Draw labelled diagram of Binary fission in Amoeba. 2
7. Write Coulomb's Inverse Square Law of magnetism. 3
8. Write the composition of Blood. 3
9. In a Vernier Calliper 1 cm of main scale is devided into 20 small equal parts. If 25 small divisions of Vernier scale are equal to 24 small divisions of main scale, find the least count of Vernier Calliper.
When the circular cap of a Screw guage is rotated 5 times, the
screw shifts by 4 mm. If there are 100 divisions on the circular
cap, find out the pitch and the least count of Screw guage. 3
10. What are the precautions taken for physical balance while weighing a substance ? 3
11. Write down the functions of Kidney.
(OR)
Why Nephron called Dialysis bag? 3
12. What is exponential growth ? 3
13. Explain the corrosion of metals. 4
14. Write adverse effects of Carbon mono-oxide. 4
15. Write difference between Saprophytic and Parasitic nutrition.
16. Write down any four characteristics of Ideal fuel.
(Or)
Write differences between renewable and non-renewable sources. 4
12. What is exponential growth ? 3
13. Explain the corrosion of metals. 4
14. Write adverse effects of Carbon mono-oxide. 4
15. Write difference between Saprophytic and Parasitic nutrition. 4
16. Write down any four characteristics of Ideal fuel.
(Or)
Write differences between renewable and non-renewable sources. 4
17. What is tissue culture ?
(Or)
Write four functions of Cytokinin. 4
18. Explain chain reaction by diagram. 5
19. Describe floating tank type Biogas plant with the help of a labelled diagram.
(OR)
Explain the solar cooker under the following heads :
(a) Principle
(b) Labelled diagram of solar cooker
(c) Uses
20. Explain the fractional distillation of Petroleum under the following heads :
(i) Labelled diagram of fractionating column
(ii) Name of the products at different temperature date to
distillation.
21. Differentiate between food chain and food web.
(Or)
Explain water cycle in nature. 5
22. Explain double touch method of magnetization under the following heads :
(i) Labelled Diagram
(ii) Method
(iii) Position of Poles produced.
(Or)
Explain the following with examples :
(i) Paramagnetic substance
(ii) Ferromagnetic substance
(iii) Diamagnetic substance. 5