Science
(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. Name the elements used in the manufacture of solar cells. 2
2. Define saturated solution. 2
3. Which is the power house of the cell ? 2
4. Write the definition of calorific value. 2
5. Write any two functions of Axon. 2
6. Write the names, of Hormones secreted by Adrenal gland. 2
7. Explain the fundamental and derived quantities with
examples. 3
8. Give the technological advances between the period of 1940 to
1950. 3
9. Draw a well labelled diagram of screw gauge.
( or)
pitch of screw gauge is 2 cm and number of total divisions of
circular scale is 200. find the least count of screw gauge. 3
10. Write the names-of three excretory organs in human with one function of each. 3
11. Write two methods of transportation of nutrients in plants
(Or)
How are gaseous materials excreted in Human ? Explain. 3
12. Write three points of molecular theory of magneusm. 3
13. Why is L.P.G. a good fuel ?4
14. Write down the different uses of water. 4
15. Write only the equation of action of metals with Oxygen, Chlorine,Hydrogen and any one of dilute acid. 4
16. What do you understand by Anabolic and Catabolic activities.
(Or)
Draw a labelled diagram of Palisade cell. 4
17. Draw a labelled diagram of longitudinal section of a flower.
(Or)
Why is pituitary gland known as master gland ? 4
18. Differentiate between diamond and graphite under the following
headings :
(a) Physical properties
(b) Occurrence
(c) Uses 5
19. Describe nitrogen cycle in nature with a suitable diagram.
(or)
Explain how energy flows in Biosphere. 5
20. Explain solar water heater under the following heads :
(a) Principle
(b) Labelled diagram
(c) Mechanism 5
21. What is Biogas ? Write the components and uses of biogas.
(Or)
What is energy crisis ? Discuss its effect on human society. 5
22. Explain the divide touch method of magnetization under the following heads :
(a) Labelled diagram
(b) Description
(c) Position of poles
(Or)
Write Coulomb's inverse square law of magnetism and define unit
poles. 5