MAHD AL ULOOM INTERNATIONAL SCHOOL - JEDDAH SUMMATIVE ASSESSMENT- 1 (MODEL), JUNE 2014 SCIENCE

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1 QP Code No. SCI/014 MAHD AL ULOOM INTERNATIONAL SCHOOL - JEDDAH SUMMATIVE ASSESSMENT- 1 (MODEL), JUNE 2014 SCIENCE Class: X Hall Ticket No. Date: Max. Marks: 90 Time: 3 hours. General Instructions: (i) (ii) (iii) (iv) (v) The question paper has 42 questions in all. All questions are compulsory. Question from serial number 1 to 3 carries 1 mark each. Question from serial number 4 to 7carries 2 mark each. Questions from serial numbers 8 to 19 are 3 marks questions. These are to be answered in about 70 words each Questions from serial numbers 20 to 24 are 5 marks questions. Answer of these questions should not exceed 120 words each. (vi) Question numbers 25 to 42 in section B are MCQ. (1 mark questions) SECTION-A 1. Write a balanced chemical equation to represent the following reaction. Aluminium reacts with copper chloride to give aluminium chloride and copper. 2. Give an example of a metal which can be easily cut with a knife. 3. What type of reflector is usually used in box typesolar cooker? 4. What happens to the resistance of a conductor when the length is reduced to half? Justify your answer. 5. What are the products formed when magnesium metal reacts with water? Why do the pieces of metal start floating during the reaction?

2 6. Write the balanced chemical equations for the following reactions : Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogen carbonate. Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide. 7. State Fleming s left hand rule? 8. Define combination reaction. Give one example of a combination reaction which is also exothermic. 9. Write two points of difference between aerobic and anaerobic respiration. 10. What is geothermal energy? How can this energy be used to generate electricity? 11. Calculate the number of electrons that will constitute a flow of charge of 4C. (Charge of 1 electron = C) 12. What is meant by the term magnetic field lines? List any two properties of magnetic field lines. 13. A wire is cut into three equal parts and then connected in parallel. How will this alteration effect its : resistance resistivity? 14. Classify the following reactions into different types (i) AgNO3 (aq)+nacl(aq) AgCl(s)+NaNO3(aq) (ii) CaO(s)+H2O Ca(OH)2 (iii) 2KClO3 (s) 2KCl+3O2 Which of the above reaction(s) is/are precipitation reaction(s)? Why is a reaction called precipitation reaction? 15. State and verify ohm s law? 16. (i) Name the compound which is obtained from baking soda and is used to remove Permanent hardness of water. (ii) Write its chemical formula. (iii) What happens when it is recrystallised from its aqueous solution?

3 17. Which organ secrets a hormone when blood sugar rises in our body? Name the hormone and name one enzyme released by this organ. 18. a) Define tropic movement. b)why do multicellular organisms need another means of communication between cells besides nervous co-ordination? 19. State the three advantages of using solar cell to produce electricity. Why is their use for domestic purpose limited? 20. Calculate the current drawn by an electric bulb from a 220V source if the resistance of Bulb filament is 1200ῼ. Calculate the current drawn by electric heater from a 220V source if the resistance of the heater is 100ῼ Draw a schematic diagram of a circuit consisting of a cell of 1.5V,10Ω resistor and15ω resistor and a plug key all connected in series. 21. Find out the following in the electric circuit given in Figure. Potential difference across 4 Resistance. Power dissipated in 4 Resistor. Difference in ammeter readings, if any, of A1 and A a) What are the advantages of connecting different electrical appliances in parallel? mention any three advantages. b) Draw a labeled diagram of a dc electric motor. Explain its principle and working. What is the function of split ring in an electric motor? 23. a) How is copper obtained from its ore? Write equations. How is impure copper refined by electrolytic refining? Draw diagram and write reactions at cathode and anode. 24. a) Explain in brief the mechanism of circulation of blood in the human body. Lymph is another type of fluid involved in transportation. Justify this statement by explaining the process. OR Explain the excretory system in Human beings. List any four strategies used by plants for excretion?

4 SECTION B 25. When a student dipped ph paper in the given solution, he found green colour. The given solution may be NaOH solution NaCl solution Dilute HCl Na2 CO3solution 26. The correct method of finding the ph of a solution is to : heat the solution in a test tube and expose the ph paper to the vapours formed. pour the solution on the ph paper. dip the ph paper in the solution. put a drop of the solution on the ph paper using a dropper. 27. Colourless and odourless gas is liberated when hydrochloric acid is added to a solution of washing soda. The name of the gas is : Carbon dioxide. Nitrogen dioxide. Sulphur dioxide. Sulphur trioxide. 28. When crystals of FeSO4 are strongly heated the residue obtained is red in colour. green incolour. blue in colour. colourless 29. The colour of metal deposited when iron nails are dipped in aqueous solution of copper sulphate is : reddish brown green c) grey d) Silvery white 30. What is the least count of the following voltmeter? 0.5V 0.1V 0.05V 0.005V

5 31. Four students measured the following readings by observing, the position of pointer of voltmeter as shown, the correct one is : 2.5 V b) 2.1V c) 2.2V d)2.4 V 32. For the circuits shown in figure-1 and figure-2 the ammeter reading would be : 1.0A in figure 1 and 0.0A in figure 2 0.0A in both 1.0A in both 1.0A in figure 1 and 1.0A in figure In the circuit below the voltmeter and ammeter readings would be respectively : a) 0V and 0A each b) 3V and 1A b) 1V and 3A d)3v and 3A

6 34. Which one of the following precaution is NOT to be taken while conducting the experiment to determine the equivalent resistance of two resistors connected in series? Get the circuit diagram checked by your teacher before passing current. Connect +ve terminal of the ammeter to the +ve terminal of the battery. Wait atleast for 30 seconds after closing the key. Take care that the battery is not short circuited. 35. In an experiment on photosynthesis, we cover a portion of a leaf A of a destarched potted plant with opaque paper strips of red colour, a portion of another leaf B with black opaque strip and a portion of leaf C with a green opaque strip and then keep the plant in sunlight so that photosynthesis may take place. After four hours on performing starch test the result showed no starch formation in the : covered portion of leaf A covered portion of leaf B covered portion of leaf C covered portion of any of the above 36. The figure that correctly depicts the process of removal of chlorophyll is : I II III IV

7 37. A well stained leaf peel mount when observed under the high power of a microscope shows nuclei in : only epidermal cells only guard cells guard cells and epidermal cells both guard cells, epidermal cells and stomata 38. While preparing a temporary stained mount of a leaf epidermal peel, the extra stain is removed by : washing with water washing with CaCl2 solution soaking with filter paper (d absorbing with cotton wool. 39. In the experiment demonstrating respiration in germinating seeds, KOH is used to : abosorb CO2 produced by the seeds. absorb O2 present in the flask absorb water vapour released by the seeds liberate O2 to be used by the seeds. 40. Out of the four experimental set ups shown below, which one will demonstrate the evolution of CO2 during respiration of germinating seeds? i ii iii iv

8 41. To study the dependence of current (I) on the potential difference (V) across a resistor, the correct way of connecting the ammeter and voltmeter in the circuit is. a) Ammeter and voltmeter are connected in series. b) Ammeter is connected in parallel and voltmeter in series. c) Ammeter is connected in series and voltmeter in parallel d) Ammeter and voltmeter both are connected in parallel. 42. When iron nails are dipped in copper sulphate solution for about 30 minutes,what are the correct observations? a) Iron nails become blackish in colour and there is no effect on blue colour of copper sulphate solution b) Iron nails become brownish in colour and the blue colour of copper sulphate becomes violet c) Iron nails become white and the blue colour of copper sulphate solution fades. d) Iron nails become brownish in colour and the blue colour of copper sulphate solution fades. ************************ MIS/ /SA-1/SCI/014 Page 8 of 8