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SCIENCE MODEL QUESTION PAPER – 5
I. Four Alternatives are provided for each question. Choose the most appropriate alternative
and write it in the space provided.
10x1=10
1. The energy possessed by wind is _______
a) Kinetic energy
b) Potential energy c) Mechanical energy
d) Wave energy
2. Now the government policy is to discourage use of plastic bags. The scientific reason for
this is that they are _________
a) Non-biodegradable but not - toxic
b) Bio degradable
c) Non bio degradable
d) biodegradable but toxic
3. 3. Name of this structure ________________
H
|
H-C C-C-H-H
|
H
a) Propyne
b) Propane
c) cyclopropane
d) Propene
4. One of the main function of parenchyma tissue is it _______
a) supports other tissue
b) takes part in photosynthesis
c) gives tensile strength to the plant body
d) conducts water to different parts of the plant body
5. The function of adipose tissue can be compared to heat ________
a) Regulator b) Insulator c) Conductor d) Generator
6. The ultrasound signal sent in water by sonar takes 3 seconds to return. If the velocity of
sound in water is 1.5 km/sec. the distance travelled by the signal is ________
a) 2.25 kms b) 4.5 kms.
c) 6 kms.
d) 9 kms.
7. In Kaiga Atomic power reactor plant fuel that can be used is _______
a) Coal
b) Uranium c) Petrol
d) Natural gas
8. Metals react with concentrated nitric acid and produce ________
a) Nitrates and nitrogen dioxide
b) Nitrates and nitric oxide
c) Nitrates and Nitrogen trioxide
d) Nitrates and Nitrogen pentoxide
9. In the process of preparation of soap, the organic acids are neutralized with __________
a) Sodium hydroxide b) Sodium chloride c) Sodium sulphate d) Sodium nitrate
10. The process of manipulating the genes of living organisms in the research laboratory is
_____
a) Cloning
b) DNA finger print technology
c) Tissue culture
d) DNA Recombinat technology
11. Match the names of plants given in column "A" with their structure in Column "B" and
characteristic features in Column 'C'
4x1=4
A
B
C
1) Cyclopropane
i) Cyclo Alkanes
2) Toluene
ii) Paraffins
3) Isobutene
iii) Aromatic Hydro carbone
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4) Acetylene
iv) Isomer
v) Oleffin
vi) Bio - product of
petroleum well
II. Answer the following questions :
7x1=7
12. Why pituitary gland is considered as Master gland in the Human body?
13. Why some chordates are known as Hemi chordates?
14. What happens if a body is projected upwards with a velocity less than escape velocity?
15. What is the only recognisible property of a black hole?
16. Solar heaters and solar cookers are considered as Solar Collectors. Give reason.
17. Fire wood is a conventional fuel. List any two reasons for replacing it by the alternate
sources of energy.
18. Fruit juices mixed with sugar should be consumed quickly. Give reason.
III. Answer the following questions :
16x2=32
19. Forest department authorities have noticed the leaves of the plants have developed
brown spots and cracks. Why the plants developed those cracks and brown spots? Give
reason.
20. Explain how cones play a very important role in the life cycle of Gymnosperms.
21. Differentiate: a) Tendons and Ligaments
b) Xylem and Phloem
22. Write any two applications of simple harmonic motion.
OR
Epidermis is not a complex permanent tissue. Why?
23. Write any four applications of effects of Heat.
24. Draw a neat labeled diagram of Exhaust stroke of a steam engine.
25. In Modern days there is a need for Harnessing of Nuclear energy. Give reason.
OR
Why coolant is used in Nuclear power reactor? What may happen if it is not used?
26. Give reason : a) Glass is a super cooled liquid.
b) Broken pieces of glass called cullets are used during the manufacture of glass.
27. Why the process of evaporation of Sugarcane juice syrup is done under reduced pressure?
28. A Boy standing in front of a hill claps. He hears an echo after 6 seconds. The speed of the
sound in air is 340 ms-1. What is the distance of the hill from him?
29. Give reason :
a) Stainless steel is used to make surgical instruments?
b) Alnico is used to make permanent magnets.
30. 2 Litres of gas enclosed in a vessel at 2 x 105 and allowed to expand about 4 litres under
constant temperature what would be final pressure?
31. Explain how tissue culture is a powerful tool in the field of Bio-technology.
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32. Draw a neat labeled diagram of Electroplating of a Brass article with silver.
33. What was the book written by Charles Darin on Natural Selection (evolution)? What is
mentioned in that book?
OR
What are the features of Caucasoid Human race?
34. Draw a neat labeled diagram of the parts of a single staged rocket.
IV. Answer the following Questions
5x3=15
35. a) State and Explain Dobereiner law of triads with an example.
b) Why Ionisation energy increases along a period and decreases down a group?
36. Draw a neat labeled diagram- of the structure of HIV virus?
37. Draw a neat labeled diagram of Electrolytic cell showing extraction of aluminium from
alumina.
38. a) Draw the Electronic circuit symbol of a diode.
b) Write any two applications of Diodes and Transistor?
OR
a) What is a transistor? Write the circuit symbols of n-p-n and p-n-p transistor.
b) Super conductors are a boon to the field of Electronics. Give reason.
39. Explain Watson and Crick model of DNA.
OR
a) Give reason: i) Hereditary variations are very important.
ii) The two puly nucleotide chains of DNA are not parallel but
complementary.
b) What is DNA replication? Write its significance.
V. Answer the following Questions.
3x4=12
40. a) Draw a neat labeled diagram of DC Motor.
b) Represent the flow of Direct current in the form of a graph.
41. a) Write any the differences between organic and inorganic compounds.
b) Write the structural formula of Salicylic acid and indicate the functional groups in it.
OR
a) In what was can the magnified of the induced current be increased? b) Draw a neat
labeled
diagram of DC Dynamo.
42. a) Draw a neat labeled diagram of cross section of spinal cord.
b) Draw a neat diagram of Vertical section of Human Eye.
OR
a) Write the structural formulae of isobutane and cyclohexane.
b) Why is Kerosene called a Hydro carbon?
c) Calculate the gram molecular mass of Butane (atomic mass of carbon = 12, atomic mass
of Hydrogen = 1).
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