SUMMATIVE ASSESSMENT - I (2011) Lakdfyr ijh{kk&i (2011) SCIENCE / fokku Class X / & X

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1 SUMMATIVE ASSESSMENT - I (2011) Lakdfyr ijh{kk&i (2011) SCIENCE / fokku Class X / & X Time allowed : 3 hours Maximum Marks : 80 fu/kkzfjr le; % 3?k.Vs vf/kdre vad % 80 General Instructions : i). The question paper comprises of two sections, A and B. You are to attempt both the sections. ii). All questions are compulsory. iii). There is no overall choice. However, internal choice has been provided in all the five questions of five marks category. Only one option in such questions is to be attempted. iv). All questions to section A and all questions of section B are to be attempted separately. v). Questions 1 to 4 in section A are one mark questions. These are to be answered in one word or one sentence. vi). Questions 5 to 13 in section A are two marks questions. These are to be answered in about 30 words each. vii). Questions 14 to 22 in section A are three marks questions. These are to be answered in about 50 words each. viii). Questions 23 to 25 in section A are five marks questions. These are to be answered in about 70 words each. ix). Questions 26 to 41 in section B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you. a lkeku; funsz k % (i) bl iz u i= dks nks Hkkxksa, Hkkx v vksj Hkkx c es ckavk x;k gsa vkidks nksuksa Hkkxksa ds iz uksa ds mrrj fy[kus gsaa (ii) lhkh iz u vfuok;z gsaa (iii) iwjs iz u i= ij dksbz p;u izkir ugha gs ijurq ikap&ikap vadks ds ikwap iz uksa esa Hkhrjh p;u fn;k x;k gsa bu iz uksa esa vki dsoy,d Hkhrjh p;u dks mrrj fy[kus ds fy, pqu ldrs gsaa (iv) vkidks Hkkx v vksj Hkkx c ds lhkh iz uksa ds mrrj i`fkd&i`fkd fy[kus gksaxsa (v) Hkkx v ds iz u la[;k 1 ls 4 ds iz u,d&,d vad ds gsaaa buds mrrj,d kcn vfkok,d okd; esa nsaa (vi) Hkkx v ds iz u la[;k 5 ls 13 ds iz u nks&nks vadksa ds gsaa buds mrrj yxhkx 30&30 kcnksa esa nsus gsaa (vii) Hkkx v ds iz u la[;k 14 ls 22 ds iz u rhu&rhu vadksa ds gsaa buds mrrj yxhkx 50&50 kcnksa esa nsus gsaa (viii) Hkkx v ds iz u la[;k 23 ls 25 ds iz u ikap&ikap vadksa ds gsaa buds mrrj yxhkx 70 kcnksa esa nsus gsaa (ix) Hkkx c ds iz u la[;k 26 ls 41 ds iz u iz;ksxkred dks ky ij vk/kkfjr cgqfodyih iz u gsaa izr;sd iz u,d vad dk gsa fn, x;s pkj fodyiksa esa ls vkidks dsoy,d lcls mi;qdr fodyi pquuk gsa SECTION-A / ' ' 1. What is meant by a chemical reaction? Page 1 of 16

2 2. Why do calcium floats in water? 3. List two nutrients that the slurry left blind in the bio gas plant contains. 4. Mention any two factors on which the resistance of a cylindrical conductor depend. 5. What are amphoteric oxides? Give two examples. 6. What is a neutralisation reaction? Give one example. X YSO X SO Y Y XSO No reaction 4 Out of the two elements, X and Y, which is more reactive and why? X YSO X SO Y Y XSO X Y 8. Give an example each for thermal decomposition and photo chemical decomposition reactions. Write relevant balanced chemical equations also. 9. What are the final products produced after digestion of carbohydrates and proteins? 10. You are given with two solar cookers, one with a glass cover and other with top open. Which one is more efficient? Given reason for your answer. 11. An electric iron has a rating of 750 W; 220 V. Calculate the (i) current consumed by it, the Page 2 of 16

(ii) (i) (ii) its resistance when in use. 750 W; 220 V 12.

What does the following circuit symbols represent?

current of 4 A from the source. Find the resistance of heater when in use. (i) (ii) 60 V 4 A 14.

3 (ii) (i) (ii) its resistance when in use. 750 W; 220 V 12. Identify the poles of the magnet in the given figure (1) and (2) What does the following circuit symbols represent? (i) (ii) The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. Find the resistance of heater when in use. (i) (ii) 60 V 4 A 14. Write balanced equations for the following mentioning the type of reaction involved. (i) Aluminium Bromine Aluminium bromide (ii) Calcium Carbonate Calcium Oxide Carbon dioxide (iii) Silver Chloride Silver Chlorine Page 3 of 16

4 (i) (ii) (iii) 15. What are strong acids and weak acids? Give an example for each. 16. A gas X reacts with lime water and forms a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y. Give the chemical equation of the reactions involved. X X Y Y 17. What is tropism? Design an experiment to demonstrate hydrotropism with the help of diagram. 18. Which part of the brain controls involuntary actions? Write the function of any two regions of it. 19. List any three hazards of nuclear waste. How does the disposal of nuclear waste pose a problem for the plant and animal life? 20. Study the circuit and find : (i) total resistance in the arm CE. (ii) current in the arm AB. (iii) potential difference across 4 resistor Page 4 of 16

5 (i) (ii) CE AB (iii) In the following table the values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are shown : I (amperes) V (volts) Plot a graph between V and I and use this graph to find the value of current when potential difference across the resistor is 5 V. I I ( ) V ( ) V I 5 V 22. How will the magnetic field produced at a point due to a current carrying circular coil change if we increase the : (i) current flowing through the coil? (ii) direction of current through th coil? (iii) number of turns in the coil? 23. How is copper obtained from its sulphide ore? Write balanced chemical equations. Give the electrolytic refining of impure copper with labelled diagram. OR Page 5 of 16

6 Name the main ore of mercury. How is mercury obtained from its ore? Give balanced chemical equations. What is thermit reaction? How is it used to join the railway tracks or cracked machine parts? Name the method used to extract metals of high reactivity. 24. Draw diagram to show the nutrition in amoeba and label the part used for this purpose. Mention any other purpose served by this part other than nutrition. Name the glands associated with digestion of starch in human digestive tract and mention their role. How is required ph maintained in the stomach and small intestine. ph OR Draw a neat diagram of excretory system of human beings and label the following : (i) Kidney (ii) Ureter (iii) Urinary Bladder (iv) Urethra How is urine produced. Name two excretory products other than O 2 and CO 2 in plants. (i) (ii) (iii) (iv) O 2 CO When do we state that an electrical appliance is earthed? Mention the function of earth wire in electric lines. Why is it necessary to earth the electric appliances having metallic body? Explain what is short circuiting and overloading in an electric supply. OR State Flemings left hand rule with a labelled diagram. A coil of insulated copper wire is connected to a galvanometer. What happens if a bar magnet is Page 6 of 16

(i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary

On putting a few drops of a liquid on a ph strip, the colour of the ph strip changed to

colourless to blue. red to blue. (d) blue to red. (d) 28.

7 (i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil? (i) (ii) (iii) SECTION B / ' ' 26. On putting a few drops of a liquid on a ph strip, the colour of the ph strip changed to red. This liquid is most probably : NaHCO 3 HCl NaOH (d) C 2 H 5 OH ph ph - NaHCO 3 HCl NaOH (d) C 2 H 5 OH 27. A student adds a few drops of universal indicator to an aqueous solution of sodium hydroxide. He would observe that the colour of the solution changes from : colourless to red. colourless to blue. red to blue. (d) blue to red. (d) 28. Four students performed the reactions of a dil. hydrochloric acid and a solution of sodium hydroxide with zinc metal and solid sodium carbonate separately. They reported the possible reaction by ( ) and no reaction by (X). In which of the following sets all observations are correct? A B C (d) D Page 7 of 16

8 ( ) (X) A B C (d) D 29. The colour of metal deposited when iron nails are dipped in aq. solution of copper sulphate is : reddish brown no metal is deposited grey (d) silvery white (d) 30. While doing an experiment a student observed that the blue colour of the aqueous copper sulphate solution was changed to pale green by immersing a metal rod in it. The metal of the rod used by the student is : iron zinc silver aluminium (d) 31. The current flowing through a resistor connected in an electrical circuit and the potential difference developed across its ends are shown by the position of the pointer on the scales of ammeter and voltmeter respectively. The value of resistance of the resistor in ohm is : (d) 10 Page 8 of 16

the circuit and potential difference V accross the resitor R, if

V will increase I will decrease I will increase V will decrease

remain unchanged. I R V V I I V I V (d) V A 33.

The correct choice of voltmeter for doing the experiment with a

9 (d) Which one of the following is correct about the current I through the circuit and potential difference V accross the resitor R, if one increases the number of cells in the given circuit? V will increase I will decrease I will increase V will decrease Both I and V will increase (d) Only V will increase and I will remain unchanged. I R V V I I V I V (d) V A 33. You are given four voltmeters of given ranges. The correct choice of voltmeter for doing the experiment with a battery of 4.5 V is : Voltmeter with range of 0-1V Voltmeter with range of 0-3V Voltmeter with range of 0-4V (d) Voltmeter with range of 0-5V 4.5 V Page 9 of 16

0-1 V 0-3 V 0-4 V (d) 0-5 V 34. For the circuits A and B shown below, the voltmeter readings would be : (d) 0.

set up. Which one of the following statements will be true for this circuit?

10 0-1 V 0-3 V 0-4 V (d) 0-5 V 34. For the circuits A and B shown below, the voltmeter readings would be : (d) 0.6 V in circuit A and 2.5 V in circuit B 0 V in both circuits 1 V in both circuits 0 V in circuit A and 3 V in circuit B A B A 0.6 V B 2.5 V 0 V 1 V (d) A 0 V B 3 V 35. To determine the equivalent resistance of a series combination of two resistors R 1 and R 2, a student arranges the following set up. Which one of the following statements will be true for this circuit? It gives : incorrect reading for both current I and potential difference V. correct reading for current I, but incorrect reading for potential difference V. correct reading for potential difference V but incorrect reading for current I. (d) correct readings for both V and I. Page 10 of 16

11 R 1 R 2 I V I V I (d) I V 36. The figure that correctly depicts the removal of chlorophyll is : (I) (II) (III) (d) (IV) (I) (II) (III) (d) (IV) 37. In an experiment on photosynthesis students were instructed to cover a portion of a leaf of a destarched potted plant with opaque paper as shown : Page 11 of 16

A covered one of the leaves with red strip, B with green, C with blue, D with black.

: the portion covered with red, green & blue strips the portion covered with green strips

38. A student was asked to focus a permanent slide under the high power of a microscope.

(B) (C) (D) Place the slide on the stage Clean the microscope and lenses Focus the

12 A covered one of the leaves with red strip, B with green, C with blue, D with black. When the starch test was done on the leaves after 4 hours, the result showed no starch in : the portion covered with red, green & blue strips the portion covered with green strips the portion covered with black and blue strips (d) any of the covered portions A B C D (d) 38. A student was asked to focus a permanent slide under the high power of a microscope. This involved the following steps which have not been written in a correct sequence : (A) (B) (C) (D) Place the slide on the stage Clean the microscope and lenses Focus the material with the help of coarse adjustment Place the low power objective lens above the slide Page 12 of 16

(E) (F) Sharpen the focus with fine adjustment Bring high power

B, D, E, F, C B, A, C, D, E, F A, B, F, C, D, E (d) B, A, D, C, F, E

Diagram showing a microscopic view of epidermal tissue (d) is correct

is wrong because the guard cells are directed backwards.

13 (E) (F) Sharpen the focus with fine adjustment Bring high power objective lens over slide The correct sequence of these steps is : A, B, D, E, F, C B, A, C, D, E, F A, B, F, C, D, E (d) B, A, D, C, F, E (A) (B) (C) (D) (E) (F) A, B, D, E, F, C B, A, C, D, E, F A, B, F, C, D, E (d) B, A, D, C, F, E 39. Diagram showing a microscopic view of epidermal tissue (d) is correct in all aspects. is wrong because stoma is not shown. is wrong because the guard cells are directed backwards. is correct because two guard cells and stomata are present. Page 13 of 16

14 (d) 40. In the following experimental set up a small test tube containing KOH pellets is kept in the conical flask to absorb : air in the flask. moisture in the flask. oxygen in the flask. (d) CO 2 released by the germinating seeds during respiration. KOH Page 14 of 16

15 (O 2 ) (d) CO After performing the experiment to show that germinating seeds give out carbon dioxide during respiration, students drew the following labelled diagrams. The correct labelled diagram is A B C (d) D Page 15 of 16

16 A B C (d) D Page 16 of 16

SUMMATIVE ASSESSMENT - I (2011) Lakdfyr ijh{kk&i (2011) : 80 fu/kkzfjr le; % 3?k.Vs vf/kdre vad % 80

SUMMATIVE ASSESSMENT - I (2011) Lakdfyr ijh{kk&i (2011) 570035 SCIENCE / fokku Class X / & X Time allowed : 3 hours Maximum Marks : 80 fu/kkzfjr le; % 3?k.Vs vf/kdre vad % 80 General Instructions : i).