Class IX Original Question paper Social Science Summative -2 for 2013-14[code-3VF8WP2] Time: 3-3and1/2 hr _ Max mark: 100 [includes 10 marks based on Open Text Theme] Q No. 1-8 carry 1 mark each 1. In which year was “criminal Tribal act” passed? OR, What do you mean by the term,”Blandongdiensten” OR, Why was it said that seen from east coast , America seemed to be land of promise in the early 19th century. 2. What type of climate does Rajasthan Desert have? 3. Distributing pamphlets publishing ant business be called correctly exercising which fundamental right to freedom 4. How are candidates elected in India? 5. What do you mean by Reservation Policy? 6. Name the prime-Minister of India who release a special type of stamp entitled” Wheat revolution” 7. How many days of employment are guaranteed under NREGA? 8. When did green revolution takes place in India? 9. Name two cattle herders from the central plateau of India. How do they earn a living? OR, Mention the three conclusions that Dietrich Brandis drew about Indian forest OR, Describethe life of people who lived in America till the 1780’s Original Exam Paper with OTBA 2014 IX Maths Original Exam Paper with OTBA 2014 Download File IX Science Original Exam Paper with OTBA 2014 Download File IX Social Science Original Exam Paper with OTBA 2014 Download File
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IX Hindi Original Paper with OTBA 2014 Download File IX English Original Paper with OTBA 2014 Download File Maths Original Paper with OTBA 2014 Download File IX Science Original Paper with OTBA 2014 Download File IX Social Science Original Paper with OTBA 2014 Download File Time: 3-3and1/2 hr Max mark: 100 1 mark 1. As per the law of definite proportional carbon and oxygen combine in ratio 3: 8. Compute the mass of oxygen gas that would be required to react completely with 6 gm carbon. 2. A pore bearing organism like creature “A” belong to a phylum “B” of kingdom Animalia. 3. In which reason is soil erosion very difficult to revert. 2 marks 4. Explain, What is Organ specific manifestation? 5. A man drops a stone of mass 2 kg room the top of a building of height 15m when it reaches the ground, find its kinetic energy. 6. When an object is immersed in the fluid name the two forces acting on it. 3 marks 7. (a) The mass number of an element is 18. It contains 7 electrons. What is the number of proton? and neutron in it. (b) State the problem of atomic structure which was solved after the discovery of neutron. 8.(a)From Rutherford a - particle scattering experiment give the experimental evidence for deriving the conclusion that (i) Most of the space inside the atom is empty (ii) the nucleus of atom is positively charged (b)An element has mass number 31 and atomic number 15 find (i) The number of neutron in element (ii) The number of electron in element9. Write three point of difference between an atom and molecules 10. Carolus Liniaus gave the two kingdom of classification. Latter it was changed by Ernst Haikel (1894) and in 1959 , ,Whittaker gave the five kingdom classification. Do you think that studying about the work done by earlier scientists or their obsolete theories is useful for student of this generation? Give three reasons. 11.What are phanerogams? Name its two groups along with the criteria of division. 12. A man has an audible range from 20Hz to 20kHz. What are the wave lengths of sound in air corresponding to these two frequencies? (Speed of sound is 344m/s) 13.How does the sound produced by a musical instrument , reach your ears? Astronauts need radio telescope to talk to each other on moon why? 14. (A) Name the type of energy posses by moving object? (b) Derive the expression for this energy for an object moving with velocity v and having mass m 15.(a)Define frequency and amplitude. (b)Draw diagram to represent (i) soft sound (ii) Loud sound 16. A solid weight 75g in air and 55.6 g in water. Find the relative density of the solid. Also state if the object will float or sink when immersed in water. 17. How are cloud formed and what bring us rain. 18. Mention any three important roles of water essential for life of organism on the earth’s surface. 5 marks 19.(a)Write chemical formula of all compounds that can be formed by the combination of following ions: Ca2+ , K+ , Fe3+ , Cl-, SO42- (b)Molar mass of nitrogen is 14u. What will be the mass of one atom of nitrogen in gram? 20. Fill in the blanks Disease microbes Target organ Mode of transmission Meningitis virus -----(a)------ Fecal contamination Hepatitis ---(b)---- ---(c)------- Contamination water ---(d)----- Bacteria Lungs ----(e)------------ Ringworm fungus ---(f)------- Indirect Contact ---(g)------ Virus Lungs -----(h)----------- Dengue fever ---(i)----- Whole body ----(j)----------- 21.(a)What kind of food is advised when we fall sick and why (b)Mention any three basic conditions required for good health. 22. Define frequency and wavelength with reference to sound. Explain what is echo . Write full form of SONAR. Give two application of Ultrasound. 23. (a) Define 1Kwh. (b) How is the power related to the speed at which an object is lifted? (c) if an electric iron of 1600W is used for 45 min every day , find the electric energy consumed in month of march. 24. What is meant by depletion of Ozone layer? Mention one important feature of ozone in atmosphere. Identify the factor responsible for creation of ozone hole? Summative Assessment - II Class X Science 2014 Board paper solution 31_2 1. Atomic no. of x = 12; Atomic No. of y = 16 2. The transfer of traits from parents to offspring is called heredity. 3. Paper and glass can be easily recycled but thrown in the dust bin. 4. This is because both the father and the mother contribute practically equal amounts of genetic material to the child during sexual reproduction in forming ztgote. 5. Object placed between pole and focus see in diagram: 6. Decomposer break-down the complex organic substances into simple inorganic substances. The natural replenishment of the soil also takes place by Decompose. 7. Watershed management is the study of the characteristics of a watershed. It helps to manage water quality, water supply, and drainage and rainwater flow. It also ensures sustainable maintenance planning of a watershed. Benefits of a watershed management system: Water quality is strictly maintained. Distribution of water is equal and sustainable. 8. The producers convert solar energy into chemical energy in the form of organic compounds. The primary consumers (herbivores) derive their nutrition from the producers. According to the energy transfer law, only 10% of energy is transferred from one trophic level to the other. So, the energy that is captured by the producers does not revert back to the Sun and the energy transferred to the herbivores does not come back to the producers. It just keeps on moving to the next trophic level in a unidirectional way. That is why the flow of energy in the food chain is always unidirectional. A large number of pesticides and chemicals are used to protect our crops from pests and diseases. Some of these chemicals are washed down from the soil, while some enter the water bodies. From the soil, they are absorbed by plants along with water and minerals; and from the water bodies, they are taken up by aquatic plants and animals. This is how these chemicals enter the food chain. As these chemicals cannot decompose, they accumulate progressively at each trophic level. This increase in the concentration of harmful chemicals with each step of the food chain is called biomagnification. As human beings occupy the top level in any food chain, these chemicals get accumulated in our bodies. 10. (a) He should use a concave mirror, as it forms a real image on the same side of the mirror. (b) Object distance, u = -12 cm image distance, v = - 48 cm Magnification, m = -vu = -(-48)(-12) = -4 The minus sign in magnification shows that the image formed is real and inverted. (c) The image is formed at a distance of 36 cm from the object. (d) In this case, the image is formed beyond the centre of curvature. This image is real, inverted and enlarged. 11. (i) The phenomena of the splitting of the white light into its constituents colours is called dispersion of the light. Therefore, the phenomena observed is dispersion of light. The dispersion of light is caused, because different constituent colours of light offers different refractive index to the material of the prism. (ii) The formation of rainbow is caused by the dispersion of white sunlight into its constituents colours. (iii) Based on the dispersion of white light into its constituent colours we conclude that: (a) White light consists of seven colours. (b) The violet light suffers the maximum deviation and red light suffers the minimum deviation 12. Given: C2H4O2 + RCH2OH →H+X RCH2OH →H+KMnO4 C2H4O2 Chemical reactions involved: CH3COOH + C2H5OH → H+ CH3COOC2H5 C2H4O2 Alcohol X C2H5OH →H+KMnO4 CH3COOHAlcohol (i) The carboxylic acid involved in the reaction is acetic acid (CH3COOH). (ii) The alcohol involved in the reaction is ethanol (CH3CH2OH). (iii) X is the ester formed by the condensation of acetic acid, and ethanol is ethyl acetate (CH3COOC2H5) MCQS 25. (C) Convex lens of focal length 20 cm. 26. (B) Concave and F1 > F2 27. (D) 2, 3 and 4 28. (C) 20 cm on the other side of the lens and is of the same size, real and inverted. 29. (D) Y, Q and P 30. (B) Q 31. (C) ∠r only 32. (C) III 33. (A) Plumule, Cotyledon, Radicle 34. (D) Radish and carrot 35. (C) III and IV 36. (C) III, II, I, IV 37. (B) II, I, IV, III 38. (A) 2, 3 and 5 39. (D) I, II and IV 40. (B) the ethanoic acid dissolves readily in water. 41. (C) White pellets/flakes 42. (A) the reaction is exothermic and the reaction mixture is acidic. 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