Class 10 Science Board Roll no. ____________
1. The molecular formula of ethyl alcohol is ___________. 1
2. Full form of LSD is _________________. 1
3. Glomerulus is found in _________________. 1
4. The term genetics was coined by ______________. 1
5. The first antibody produced in response to antigen is ________. 1
6. ____________ gas is released from bleaching powder. 1
7. Full form of synthetic polymer PAN is _______________. 1
8. Unit of power (in work) is ___________and in lens is __________. 2
9. Botanical name of the state tree of Rajasthan is _______________. 1
10. Full form of IUPAC is _____________________________. 1
11. Ptyalin is also known as ______________. 1
12. Explain the role of salivary gland in digestion of food. 3
13. State the laws of inheritance. 3
14. What is water of crystallisation? Give examples. 3
15. Write a chemical equation of (a) combination reaction
(b) decomposition reaction (c) displacement reaction. 3
16. Explain Dalton’s atomic theory. 3
17. Write the molecular structure of (a) 2-pentene (b) 1-chloro-2-butene
(c) 2-methyl butane 3
18. An object moving with a uniform velocity has 2500 J kinetic energy.
If its mass is 50 kg, find its velocity. 3
19. Draw neat and labelled diagram of: 3x4=12
(a) Human Respiratory System or Human Heart
(b) Human Kidney or Human Reproductive System (Male or Female)
(c) Structure of Antibody or Structure of Eye
(d) Construction of DC Generator
20. Describe the different species classified by IUCN. 5
21. Describe the important medicinal plants. 5
22. Prove that the mechanical energy of a freely falling object is conserved. 5
23. Derive the formula of Resistance in a series connection. 5
24. Focal length of a convex lens is 50 cm. If object is at 30 cm, find the distance of image. What will be its magnification? 5
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