(Hindi & English Version)
Time: 3 Hours Maximum Marks : 75
Note :
(i) All questions are compulsory.
(ii) Internal options are given in Question Nos. 8, 11, 15,17,
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. Define unsaturated solution. 2
2. What is Ocean Thermal Energy ? 2
3. What is Photosynthesis ? 2
4. Write in an orderly manner the colours of visible light of the sun. 2
5. What is Reproduction ? Write the different kinds of Reproduction. 2
6. Draw a labelled diagram of longitudinal section of flower. 2
7. Write the names of scientists who invented the following :
(a) Telescope
(b) Steam engine
(c) Aeroplane. 3
8. Which precautions should be taken while using the screw guage ?
(Or)
Write any three differences between stop clock and stop watch. 3
9. Write any three differences between scalar and vector quantities. 3
10. Write the composition of Blood. 3
11. Describe the excretory organs found in the body of human other than kidney.
(Or)
Draw the labelled diagram of internal structure of kidney. 3
12. Write Coulomb's Inverse Square Law of magnetism. 3
13. Write main uses of metals 4
14. Explain in detail the Green House effect. 4
15. What are fossil fuels ? How are they formed ?
(Or)
Why is burning of food in the body called slow combustion ? 4
16. Write difference between Saprophytic and Parasitic nutrition. 4
17. Describe in brief the various types of asexual reproduction in plants.
(Or)
Write the functions of Brain. 4
18. Explain the functional distillation of Petroleum under the following headings:
(a) Labelled diagram of fractionating column
(b) Name of the products at different temperature due to distillation 5
19. Draw neat and labelled diagram of Nitrogen cycle.
(Or)
Explain how energy flows in Biosphere. 5
20. Differentiate between nuclear fission and nuclear fusion reactions. 5
21. 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 5
22. Describe a method for verification of Ohm's law in the laboratory under the following heads :
(a) Ray diagram of the circuit
(b) Method
(c) Main precautions.
(Or)
An electric heater uses a current of 10 A through a source of
220 volts. If this heater is used 5 hours daily, then calculate the
expenses in 30 days. Rate of 1 unit (1 kWh) = 1 rupee. 5