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Time: - 2:30 Hrs

SPECIAL QUESTION PAPER Science – Full portion test

Marks: - 75

Instructions: i) Check the question paper for fairness of printing. If there is any lack of ii) Use Black or Blue ink to write and pencil to draw diagram Note: This question paper contains three sections

(1 x 15 = 15)

SECTION – I 1. Theory of natural selection was proposed by (Charles darwin; Hugo-de-vries; Gregor johann mendel; Jean baptize lamarck) 2. Lesions in the form of small nodules are called _________ (Tubes; Cubes; Tubercles; Cells) 3. Neuro transmitters into the synapse are released by ___________ (Tips of Dendrites; Synaptic knobs; Organelles of cyton; Myelin sheath of Axon) 4. Which types of seeds are protected from the digestive juices by their seed coat, when the

www.asiriyar.com seeds are eaten along with the edible part.

(Tomato and Guava; Mango and Apple; Cucumber and Mango; Lemon and Apple)

5. You were given two unlabelled slides with blood smearing of amphibian and a mammal you would differentiate the blood samples by observing the ________ (Colour; Nature of RBC’s; Nature of WBC’s; Contents of plasma) 6. Beer and wine are formed by __________ (Fermentation; Aerobic respiration; Chemical reaction; Perspiration) 7. ______________ is 9mts in length (Oesophagus; Pharynx; Small intestine; Alimentary Canal) 8. _____________ is a green house gas which causes climate changes and global warming (Hydrogen; Oxygen; Nitrogen; Carbon dioxide) 9. Crushing grain or pumping water is done by using __________ (Solar energy; Wind energy; Garbage energy; Water cycle) 10. ___________ is a opaque in nature (Water; True Solution; Colloids; Suspensions) 11. Tooth pastes are generally ___________ (Mildly acidic; Alkaline; Neutral; Strongly acidic) 12. Group 16 elements are known as ____________ (Halogens; Noble gases; Chalcogens; Alkali metals)

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13. 2 Kcl 03

2 Kcl + 302. In this chemical reaction Mn 02 acts as a ________

(Reactant; Product; Catalyst; Promoter) 14. If the distance between two objects is doubled, the force of attraction between them will become _________ (One fourth; Halved; Doubled; Constant) 15. For which colour, refractive index of glass is maximum (Red; Violet; Green; Yellow) SECTION – II Note: Answer any twenty questions:

(20 x 2 = 40)

1. a) Insulin in used to cure ________ diabetes/ tuberculosis b) Monoclonal antibodies is used to cure _________ (AIDS / Cancer) 2. Identify the technical term for the following a) Protein aceous substance to detoxify the antigens. b) Toilet articles, utensils, drinking cup and glasses.

www.asiriyar.com 3. What will happen if all the grass is removed from the grass land ecosystem? 4. a) Somatic gene therapy does not affect the sperm or egg. Give reason.

b) What are the types of grape therapy?

5. Which gland is called the ‘dual gland’? Why?

6. Coconut seeds are dispersed by hydrochory. Mention the part of the fruit whose modification help in this mechanism. 7. What type of dentition is seen in animals? What are elephant tusks? 8. The polar bears have thick skin coat and woolly fur. The whales have baleen plates. Give reasons. 9. Write the three important parts of urin______ tubules. 10. List out the parts of the gastro intestinal tract in correct sequential order based on the passage of food. 11. What is photo synthesis? Depict a balanced equation for this biochemical reaction? 12. Observe the diagram. a) Name the movement seen b) Differentiate the movement 13. Show an aquatic food chain using the following organisms. (Small fish, Phytoplankton’s, King fisher, Zoo Planktons)

www.asiriyar.com 14. Complete A and B with a suitable appliances to save electric energy COLUMN (A)

COLUMN (B)

1.

?

Electronic choke

2.

?

Fluorescent bulbs

3.

Electric heater

?

4.

Wet clothes for ironing

?

15. Correct the statements a) Butane is the chief component of natural gas b) Coal, Petroleum and natural gas are renewable resource. 16. a) Which gas is dissolved in soft drinks? b) What will you do to increase the solubility of this gas? 17. Interpret-when sunlight enters through the window into a room, we can clearly see its part 18. Calculate the number of water molecules present in one drop of water which weight 0.18g. 19. Take cooper nitrate in a test tube and heat it over the flame. i) Name the types of reaction that takes place.

www.asiriyar.com ii) What is the colour of cupric nitrate?

20. Pick out the odd one out and give reason potash alum, Mohr’s salt, Mgcl2, Kcl - 6H20, Nacl

21. a) When iron is exposed to moist air, a red dish brown substance is deposited on it. What is it? Give its composition. b) What is the percentage of gold present in ‘Hallmark’ gold? c) What is the manufacture of science equipment? 22. Give a single term for each of the following: a) The rocky impurities associated with the ores. b) The process of reducing the roasted oxide ore to metal under molten condition.

23. C2H6 is the molecular formula A and B is two compounds. They have different structural formula. a) Write down their common and IUPAC names. b) Mention the functional groups of A and B. 24. Why does a boxer always move along the direction of the punch of the opponent? 25. A car of mass 1200kg is moving of 30 m/s. on applying brakes, its velocity is reduced to 10 m/s. Find the change in momentum. 26. Two bulbs of 40w and 60w are connected in series to an external potential difference. Which bulb will glow brighter? Why?

www.asiriyar.com 27. The figure is a part of a closed circuit. Find the currents i1, i2 and i3. 28. Given the function and symbol of battery and Rheostat used in electrical circuit. 29. Light which is incident on a flat surface make an angle of 150 with the surface. i) What is the angle of incidence? ii) What is the angle of reflection? iii) Find the angle of deviation. 30. a) Why do we get different colours of light? b) The magnetic field is produced by a 31. what will happen to the displacement of rod if i) Current in rod is increased ii) Stronger horse – Shoe magnet is used iii) Length of road is increased 32. Draw a ray diagrams to show the formation of images by a concave mirror when an object is between P and F. SECTION – III

www.asiriyar.com Note: i) Answer any four question by choosing on question from each part (4 x 5 = 50) ii) Each question carries five marks iii) Draw diagram wherever necessary. PART – I

1. Breast feed is the best food a) How long an infant should be breast food? b) Breast milk protects the child against pathogens. Name them. c) What kind of immunity does a child get when it is breast fed? d) Breast fed infants are healthier than bottle feed infants. Explain. 2. Draw the human brain and mention it’s functions.

PART - II 3. Explain the structure of dicot seed. 4. a) Classify the following goat, Deer, Lion, 02. b) Give detailed account on your classification. c) Define ecosystem.

www.asiriyar.com PART - III 5. How do you establish the relation between vapor density and relative molecular mass of a gas? 6. Organic compound A and B are the isomers with the molecular formula C2H6 O0 compound a produces H2 gas with sodium metal, where as compound B do not. compound A reacts with acetic acid in the presence of conc. H2SO4 to form compound with a fruity flavour. What are the isomers A, B and the compound C. PART – IV 7. State Newton’s law of gravitation. Write an expression for acceleration due to gravity on the surface of the earth. If the ratio of acceleration due to gravity of two heavenly bodies is 1:4 and the ratio of their radio is 1:3, what will be the ratio of their masses? 8. a) Draw a ray diagram to show dispersion of white light in a glass prism. b) An object of 5cm tall is placed at a distance of 10cm from a concave mirror of radius of curvature 30cm. find the nature, position and size of the image.

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