SUMMATIVE ASSESSMENT II, 2012 II, Class IX / IX

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1 SUMMATIVE ASSESSMENT II, 202 II, 202 SCIENCE / Class IX / IX Time allowed : hours Maximum Marks : General Instructions : (iv) (v) (vi) (vii) (viii) (ix) The question paper comprises of two Sections, A and B. You are to attempt both the sections. All questions are compulsory. 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. All questions of Section-A and all questions of Section-B are to be attempted separately. Question numbers to in Section-A are one mark questions. These are to be answered in one word or in one sentence. Question numbers 4 to 7 in Section-A are two marks questions. These are to be answered in about 0 words each. Question numbers 8 to 9 in Section-A are three marks questions. These are to be answered in about 50 words each. Question numbers 20 to 24 in Section-A are five marks questions. These are to be answered in about 70 words each. Question numbers 25 to 42 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. (iv) (v) (vi) (vii) (viii) (ix) Page 2 of 5

2 SECTION-A /. Write the atomicity of the following molecules. H 2SO 4 CCl 4 H 2SO 4 CCl 4 2. Name the phylum to which Leech and Earthworm belong.. What is ozone hole? ओज़ न ऩरत म छ द र क य ह त ह? 4. State the type of body cavity found in platyhelminthes. Write whether they are parasitic or free living Explain how individual health depends on social and mental well being Why do buildings have wide foundations? 2 7. Write the form of energy possessed by the body in the following situations : a coconut falling from tree. an object raised to a certain height blowing wind (d) A child driving a bicycle on road. 2 (d) 8. A 0.24 g sample of a compound of oxygen and Boron was found by analysis to contain g of boron and 0.44 g of oxygen. Calculate the percentage composition of the compound by weight. Find the number of moles in 0.44 g of oxygen gas Page of 5

(atomic mass oxygen 6.0u) 0.24 g 0.096 g 0.44 g 0.

An element 24 X loses two electrons to form a cation

Write the electronic configuration of the anion of

Write the formula of the compound formed by the

Write the postulates of Bohr model of atom.

3 (atomic mass oxygen 6.0u) 0.24 g g 0.44 g 0.44 g 9. An element 24 X loses two electrons to form a cation which combines with the anion of 2 element 5 Y formed by gaining an electron. 7 Write the electronic configuration of element X Write the electronic configuration of the anion of element Y. Write the formula of the compound formed by the combination of X and Y X 5 7 Y X Y X Y 0. Write the postulates of Bohr model of atom. Draw a sketch of Bohr model of an atom with atomic number State reasons for the following : Mammals have mammary glands. Annelids have a true body cavity. Fish possess gills. 2. Write one point of difference each between the following : Porifera and Coelenterata Gymnosperms and Angiosperms Birds and Reptiles Page 4 of 5

Mention two basic principles of prevention of infectious diseases. 4.

force? Explain. A 00 cm block has a mass of 95g.

Mention the commercial unit of energy. Express it in terms of Joules.

the potential energy of the object of mass (m) at point B and C when

4 . State the principle of Immunisation. Name two diseases for which vaccine is available. Mention two basic principles of prevention of infectious diseases. 4. Do all bodies immersed in a given fluid experience the same buoyant force? Explain. A 00 cm block has a mass of 95g. Find its relative density. (Density of water) g/cm 00 cm 95g g/cm 5. Mention the commercial unit of energy. Express it in terms of Joules. Calculate the energy in Joule consumed by a device of 60 W in hour. 60 W 6. Study the figure given and answer the following questions : What is the potential energy of the object of mass (m) at point B and C when it is raised from point A to B and B to C. Calculate the potential energy of the object when raised directly from point A to C. Calculate whether same amount of work done against gravity in each case. Page 5 of 5

5 Write your inference. m A B B C B C A C 7. Study the figure shown below and answer the following questions. Name the technique depicted in the figure. What is the principle of this technique List its two applications. Page 6 of 5

8. Explain the occurrence of land breeze in coastal areas.

म द अऩरदन क य ह त ह? म द अऩरदन क र कन क क इ द उऩ य छऱज ए 20.

Potassium carbonate (iv) Barium chloride (v) Sodium phosphate

Convert 2 moles of Magnesium Sulphate sample into number of

6 8. Explain the occurrence of land breeze in coastal areas. तट य क ष त र म स थऱ क ऊऩर क क छनम ण क व य ख य क ज ए 9. What is soil erosion? Write any two methods of preventing soil erosion. म द अऩरदन क य ह त ह? म द अऩरदन क र कन क क इ द उऩ य छऱज ए 20. Write the chemical formulae of Silver nitrate Magnesium sulphate Potassium carbonate (iv) Barium chloride (v) Sodium phosphate (vi) Sulphur dioxide Define Avogadros Number. Convert 2 moles of Magnesium Sulphate sample into number of molecules present in the sample. (iv) (v) (vi) 2 5 Write the chemical formulae of : Aluminium Chloride Potassium Oxide Hydrogen sulphide (iv) Hydrogen chloride OR/ Page 7 of 5

(v) Calcium carbonate (vi) Sodium chloride Write any two postulates of Daltons atomic theory. (iv) (v) (vi) 2. State two characteristic features of group Mollusca.

7 (v) Calcium carbonate (vi) Sodium chloride Write any two postulates of Daltons atomic theory. (iv) (v) (vi) 2. State two characteristic features of group Mollusca. Identify the organisms on the basis of the following features : A Reptile with four chambered heart An Egg laying mammal An Autotrophic Moneran OR/ Identify the kingdoms on the basis of the following features : Unicellular eukaryotic organisms Heterotrophic eukaryotic organisms Multicellular eukaryotic autotrophic organisms Give two characteristic features of the sub-phylum protochordata : Give one example each for positive and negative work done by a force. What is the work done to increase the velocity of a car from 0 km/h to 60 kmh if the mass of the car is 500 kg? 500 kg 0kmh 60 kmh 5 OR / Page 8 of 5

Power of an electrical machine is rated at 2 KWh. What does it mean? Two girls, each of weight 400 N climb up a rope through a height of 8 m.

A B 400 N 8 m 20 s B 50 s 2. State laws of reflection of sound. Explain three applications based on these laws.

Derive this relationship between the wavelength of a sound wave and its frequency with its speed.

Explain two ways in which nitrogen from the atmosphere is converted into a usable form.

उन द व छधय क ण न क ज ए ज नक द व र यझम डऱ य न इट र न क उऩय ग ककए न ऱ र ऩ म ऩरर छत त ककय त ह क र न चक र म आछऱप त म झख य प रकक रय ओ क न म छऱ त हझए

8 Power of an electrical machine is rated at 2 KWh. What does it mean? Two girls, each of weight 400 N climb up a rope through a height of 8 m. We name one of the girls A and the other B. Girl A takes 20 s while B takes 50 s to accomplish this task. What is the power of each girl? 2 Kwh. A B 400 N 8 m 20 s B 50 s 2. State laws of reflection of sound. Explain three applications based on these laws. 5 OR Explain why are sound waves called mechanical waves? Derive this relationship between the wavelength of a sound wave and its frequency with its speed. In which medium the speed of sound will be greater air or water? Give reason for your answer. 24. Explain two ways in which nitrogen from the atmosphere is converted into a usable form. Give a schematic representation of the Carbon cycle, Label the main processes involved in it. उन द व छधय क ण न क ज ए ज नक द व र यझम डऱ य न इट र न क उऩय ग ककए न ऱ र ऩ म ऩरर छत त ककय त ह क र न चक र म आछऱप त म झख य प रकक रय ओ क न म छऱ त हझए OR/ अथ What is acid rain? Name the two gases which cause acid rain. List any two harmful effects of air pollution. आर य छनर ऩण क ज ए अम ऱ य र क य ह त ह? द ग स क न म छऱज ए ज नक द व र अम ऱ य र ह त ह यझ प रद र ण क द ह छनक रक प रभ छऱज ए 5 SECTION - B / 25. To verify the law of conservation of mass in a chemical reaction, four students A, B, C and D performed the following chemical reactions. A : Heated crystals of lead nitrate(s) in a test tube B : Added quick lime to water. Page 9 of 5

C : Dipped magnesium ribbon in copper sulphate solution.

The student who is likely to get the best result is : A B C (d) D D A : B : C : D : (s) A, B, C A B C (d) D 26.

The total mass of the solutions after the reaction between the two chemicals was found to be.5 g.

0g.5g (d) 65.0 g 5.5.5 g 5.5g 58.0g.5g (d) 65.0 g 27.

9 C : Dipped magnesium ribbon in copper sulphate solution. D : Added barium chloride solution to sodium sulphate solution. The student who is likely to get the best result is : A B C (d) D D A : B : C : D : (s) A, B, C A B C (d) D 26. A student mixed 5.5 g of copper sulphate solution with an unknown mass of a solution of sodium carbonate. The total mass of the solutions after the reaction between the two chemicals was found to be.5 g. Assuming that the experiment was conducted without any error, the initial mass of sodium sulphate should be 5.5g 58.0g.5g (d) 65.0 g g 5.5g 58.0g.5g (d) 65.0 g 27. In the body of earthworm both male and female sex organs are present in the same organism. It is thus : Hermaphrodite Oviparous Unisexual (d) Viviparous क चझए क शर र म द न नर तथ म द नन ग एक ह म उऩजस थत ह त ह इस छऱए यह ह : उभयछऱ ग अण डप र क एकछऱ ग (d) र यझ क 28. Which of the following represents a moss plant body? Page 0 of 5

(d) It has three pairs of wings. Body is divided into head, thorax and abdomen. Chitinous exoskeleton.

ष, उदर (d) क इकटन र कह क क ऱ 0. Which of the following is not an Angiospermic plant?

Four students A, B, C and D are observing the seeds and flowers of gram plant.

10 A B C (d) D A B C (d) D 29. The incorrect statement with reference to Cockroach is : It has three pairs of legs. (d) It has three pairs of wings. Body is divided into head, thorax and abdomen. Chitinous exoskeleton. छतऱचट ट क स र ध म गऱत व यक तव य ह : इस क त न ड़ ट ग ह त ह इस क त न ड़ ऩ ह त ह शर र त न ड म र ट ह त ह छस र, क ष, उदर (d) क इकटन र कह क क ऱ 0. Which of the following is not an Angiospermic plant? mustard brinjal coconut (d) pinus (d). Four students A, B, C and D are observing the seeds and flowers of gram plant. They reported their observations that the gram plant has : (A) dicotyledonous seeds and trimerous flowers. (B) dicotyledonous seeds and pentamerous flowers. (C) monocotyledonous seeds and trimerous flowers. (D) monocotyledonous seeds and pentamerous flowers. The student whose report is correct is : A B C (d) D A, B, C D Page of 5

He observed that the stage in which it appears like a worm is of : egg larva pupa (d) adult

What will be the reading after the stone is suspended?

The mass of a solid object in air is 40g while its mass when fully immersed in water is 05g.

11 (A) (B) (C) (D) A B C (d) D 2. A student was observing the developmental stages in the life cycle of a mosquito. He observed that the stage in which it appears like a worm is of : egg larva pupa (d) adult (d). Before suspending a stone of mass 00g, the spring balance showed a reading of 2g. What will be the reading after the stone is suspended? 98g 99g 00g (d) 02g 00g 2g 98g 99g 00g (d) 02g 4. The mass of a solid object in air is 40g while its mass when fully immersed in water is 05g. Which of the following statement is correct about the object? The volume of the object is 05 cm The density of the object is 4g/cm The buyant force acting on the object in water is 05 N. (d) The density of the object is 0.25g/cm. 40g 05g 05 cm Page 2 of 5

us :- volume of the object mass of the object weight of the object (d) all of these (d) 6.

12 4g/cm 05 N (d) 0.25g/cm 5. In an experiment to establish the relationship between loss in weight of solid when immersed fully in a given liquid with the weight of water displaced by it, the volume of the displaced water gives us :- volume of the object mass of the object weight of the object (d) all of these (d) 6. On immersing a body fully in a liquid, the apparent loss in weight will be :- more in denser liquid independent of the density of the liquid less in a denser liquid (d) more in a lighter liquid (d) 7. An iron cuboid of dimension 0 cm 5 cm 2 cm when placed on a bed of sand will depress the sand bed the most when it is made to lie on the face having dimensions : 0 cm 2 cm 0 cm 5 cm 5 cm 2 cm (d) The depression will be same for all surface. 0 cm 5 cm 2 cm 0 cm 2 cm 0 cm 5 cm 5 cm 2 cm (d) 8. To observe and compare the pressure exerted by the three faces of a cuboid on sand, the following apparatus is available in the laboratory : iron cuboid aluminum cuboid of same dimension coarse sand in a tray (iv) fine sand in a tray The best choice would be : iron cuboid and coarse sand aluminium cuboid and coarse sand iron cuboid and fine sand (d) aluminium cuboid and fine sand Page of 5

is at an angle of 40 with the reflecting surface, the position of second tube at which ear

reflecting surface is : 0 40 50 (d) 20 40 'x' 0 40 50 (d) 20 40.

intense and broad source of sound An intense and pointed source of sound (iv) A sharp

sheet Experiment on verifying the laws of reflection of sound can be done successfully by

(vi),, (iv), (v),, (v),, (iv), (v) (d),, (iv) 4.

13 (iv) (d) 9. In the experiment on verifying the laws of reflection of sound the tube facing the clock is at an angle of 40 with the reflecting surface, the position of second tube at which ear will get the best reflected sound is obtained when the angle at which it is placed to reflecting surface is : (d) 'x' (d) A laboratory had the following apparatus available in it Two thin hollow wooden tubes An intense and broad source of sound An intense and pointed source of sound (iv) A sharp pointed detector of sound (v) A well polished metal sheet (vi) A white painted thermocol sheet Experiment on verifying the laws of reflection of sound can be done successfully by choosing the apparatus labeled as :,, (iv), (v),, (v),, (iv), (v) (d),, (iv) (iv) (v) (vi),, (iv), (v),, (v),, (iv), (v) (d),, (iv) 4. While performing experiment to determine the velocity of pulse through slinky, four students, A, B, C, D did it by stretching the slinky given to each of them to 4m, 0m,.5m, 2.8m respectively. The student who is likely to get most correct result is Page 4 of 5

A B C (d) D A, B, C, D 4m, 0m,.5m 2.8m A B C (d) D 42.

14 A B C (d) D A, B, C, D 4m, 0m,.5m 2.8m A B C (d) D 42. In performing the experiment to measure velocity of pulse in a slinky, Mita stretched the slinky to 4.5m length. Time taken by the pulse making 5 journeys from one end to the other is 5s. The speed of pulse measured by her would be 0.9 ms ms.6 ms (d) 4.5 ms 5s 4.5m 0.9 ms ms.6 ms (d) 4.5 ms Page 5 of 5

SUMMATIVE ASSESSMENT II, 2012 II, 2012 SCIENCE / Class IX / IX. Time allowed : 3 hours Maximum Marks :

SUMMATIVE ASSESSMENT II, 2012 II, 2012 SCIENCE / Class IX / IX. Time allowed : 3 hours Maximum Marks : SUMMATIVE ASSESSMENT II, 202 II, 202 SCIENCE / Class IX / IX 47005 Time allowed : hours Maximum Marks : 90 90 General Instructions : The question paper comprises of two Sections, A and B. You are to attempt