Download NIOS 10th Class Oct 2015 212 Science Question Paper

This Question Paper consists of 30 questions and 11 printed pages.

? ?-? ? 30 ? ? 11 ? ? ?

SCIENCE AND TECHNOLOGY
( ? ? ?)
(212)

Day and Date of Examination

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Signature of Invigilators 1.
? ? ? 2.

General Instructions :

1. Candidate must write his/her Roll Number on the first page of the Question Paper.

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2. Please check the Question Paper to verify that the total pages and total number of questions contained in the Question Paper are the same as those printed on the top of the first page. Also check to see that the questions are in sequential order.
3. For the objective type of questions, you have to choose any one of the four alternatives given in the question i.e. (A), (B), (C) or (D) and indicate your correct answer in the Answer-Book given to you.
4. All the questions including objective type questions are to be answered within the allotted time and no separate time limit is fixed for answering objective type questions.
5. Making any identification mark in the Answer-Book or writing Roll Number anywhere other than the specified places will lead to disqualification of the candidate.
6. Write your Question Paper code No. 51/AS/3-A on the Answer-Book.

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7. (a) The Question Paper is in English/Hindi medium only. However, if you wish, you can answer in any one of the languages listed below :
   English, Hindi, Urdu, Punjabi, Bengali, Tamil, Malayalam, Kannada, Telugu, Marathi, Oriya, Gujarati, Konkani, Manipuri, Assamese, Nepali, Kashmiri, Sanskrit and Sindhi.
   You are required to indicate the language you have chosen to answer in the box provided in the Answer-Book.
   (b) If you choose to write the answer in the language other than Hindi and English, the responsibility for any errors/mistakes in understanding the question will be yours only.

? ? :

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1. ? ? ? ? ? ? ? ? ? ?
2. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
3. ? ? ? ? ? ? (A), (B), (C) ? (D) ? ? ? ? ? ? ? ? ? ? ?-? ? ? ? ? ?
4. ? ? ? ?-? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
5. ?-? ? ?-? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

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6. ? ?-? ? ? ? ? ? 51/AS/3-A ?
7. (?) ? ? ? /? ? ? ? ?, ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
   ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? ? ?
   ? ?- ?-? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
   (?) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/? ? ? ? ? ?

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SCIENCE AND TECHNOLOGY
( ? ? ?)
(212)

Time : 2¼ Hours ] [Maximum Marks : 85
? : 2¼ ? ] [ ? : 85

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Note :

1. All questions are compulsory.
2. Marks are indicated against each question.

? :

1. ? ? ? ?

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2. ? ? ? ? ? ? ? ? ?

1. Which of the following is most appropriate reason for flushing bags of fried potato chips with nitrogen gas by the chips manufacturers ? 1
   1. To keep the chips dry and crisp.
   2. To prevent oxidation of oil present in chips.
   3. To prevent formation of fungus on chips.
   4. To prevent corrosion of chips.

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   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
   1. ? ? ? ? ? ? ? ?
   2. ? ? ? ? ? ? ? ? ?
   3. ? ? ? (?) ? ? ? ? ?
   4. ? ? ? ? ? ?

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2. The oil rises up in a cotton wick of a lighted lamp because of : 1
   1. its viscosity
   2. capillarity
   3. polar nature of oil
   4. low density of oil
   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
   1. ? ?

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   2. ?
   3. ? ? ? ?
   4. ? ? ? ?
3. Consider the following chain :
   

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   Water ? Algae ? Fish ? Pelican bird
   If DDT is present in water, which of the following will have maximum concentration of DDT ? 1
   1. Water
   2. Algae
   3. Fish
   4. Pelican bird

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   ? ? ? ? ? :
   ? ? ? ? ? ? ? ?
   ? ? ? ?.?.? (DDT) ? ? ? ? ? ? ? ?.?.? ? ? ? ? ?
   1. ?
   2. ?
   3. ?

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   4. ? ?
4. When there is sudden dust storm, we immediately close our eyes. This reaction is controlled by : 1
   1. Cerebrum
   2. Cerebellum
   3. Medulla oblongata

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   4. Spinal cord
   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
   1. ? ?
   2. ? ?
   3. ? ? ?
   4. ? ? ?

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5. Sand in deserts cools faster than sea water during nights because : 1
   1. Sand is solid whereas sea water is liquid
   2. Sand is pure whereas sea water contains salts
   3. Specific heat of sand is lower than sea water
   4. Sea water possesses more energy due to its motion as compared to sand

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   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
   1. ? ? ? ? ? ? ? ?
   2. ? ? ? ? ? ? ? ? ? ? ? ?
   3. ? ? ? ? ? ? ? ? ? ? ? ? ?
   4. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

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6. An element reacts with oxygen to form an oxide which dissolves in water to form a solution that turns blue litmus red. The oxide dissolves in NaOH to form salt and water. The element is : 1
   1. Sodium
   2. Sulphur
   3. Magnesium
   4. Aluminium
   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NaOH ? ? ? ? ? ? ? ? ? ? :
   1. ?

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   2. ?
   3. ?
   4. ?
7. Which of the following is not the sign of good mental health ? 1
   1. Sensitivity towards needs of others

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   2. Very emotional
   3. Full of confidence
   4. Ability to cope with conflict and disagreement
   ? ? ? ? ? ? ? ? ? ? ? ?
   1. ? ? ? ? ? ?
   2. ? ? ?

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   3. ? ? ? ?
   4. ? ? ? ? ? ? ? ? ? ?
8. What will you observe when drops of methyl orange are added in a test tube containing sour milk ? 1
   1. Content of the test tube will turn red
   2. Content of the test tube will turn orange

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   3. Content of the test tube will turn yellow
   4. Content of the test tube will turn blue
   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
   1. ? ? ? ? ? ? ? ?
   2. ? ? ? ? ? ? ? ? ? ?
   3. ? ? ? ? ? ? ? ?

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   4. ? ? ? ? ? ? ? ?
9. A body dropped from certain height falls freely under gravity. Which of the following graphs represents the relationship between velocity and time of the body during its motion ? 1
   1. Velocity
      (?)
      Time
      

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      (?)
   2. Velocity
      (?)
      Time
      (?)

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   3. Velocity
      (?)
      Time
      (?)
   4. Velocity
      

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      (?)
      Time
      (?)
   ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
   1. Velocity
      (?)
      

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      Time
      (?)
   2. Velocity
      (?)
      Time
      

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      (?)
   3. Velocity
      (?)
      Time
      (?)

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   4. Velocity
      (?)
      Time
      (?)

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10. Explain nuclear fission. Give reason for the release of huge amount of energy during nuclear fission. 2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
11. Differentiate between ‘Mitosis' and ‘Meiosis'. Give one example of each of these. 2 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
12. What is meant by third degree burn ? What first aid would you give to a person who has received such burn ? 2 '? ? ? ?' ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
13. What is haemoglobin? Name the blood cells which contain haemoglobin. Write one important function of haemoglobin. 2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
14. Explain why does a sewing needle have a sharp pointed tip ? 2 ? ? ? ? ? ? ? ? ? ? ? ? ?

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15. Draw a ray diagram to explain formation of small and erect image of big object in a rear view mirror of a car. 2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
16. An element ‘A' has atomic number 12 and ‘B' has atomic number 8. What type of bond will be formed between them and why ? Write the formula of the compound formed. 4 ? ? 'A' ? ? ? 12 ? ? ? 'B' ? ? ? 8 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
17. (a) Write the SI unit of work in terms of base units. What is the special name and symbol of this unit ?
    (b) Represent the following measurements by using suitable SI prefixes :
    • Radius of Sun = 6.9×108 m
    • Radius of hydrogen atom = 5×10-11 m

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    (a) ? ? SI ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    (b) ? SI ? ? ? ? ? ? ? ? ? :
    • ? ? ? = 6.9×108 m
    • ? ? ? ? ? ? = 5×10-11 m
    4
18. Write the name and structure of the (i) simplest alkyne and (ii) simplest alkene. Also write the general formula of homologous series of alkenes. 4 (i) ? ? ? ? (ii) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

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19. What is meant by ozone hole ? What are its causes ? Write two hazards of ozone hole. Suggest two ways to prevent damage to ozone layer. 4 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
20. Give reasons for the following :
    (a) An iron nail sinks in water whereas huge ship floats in water.
    (b) A fielder moves his hands backward while catching a fast moving cricket ball. 4 ? ? ? ? ? :
    (a) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    

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    (b) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
21. (a) Define a gene with respect to its chemical nature. Explain the difference in the gene combination of two persons having blood group A and O.
    (b) Name any one genetic disorder. Explain its cause and write its symptoms. 4 (a) ? ? ? ? ? ? ? ? ? ? ? ? A ? O ? ? ? ? ? ? ? ? ? ?
    (b) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
22. Give reasons for the following :
    

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    (i) During severe winter aquatic animals do not die even in frozen lake.
    (ii) A green layer is formed on a statue made of copper after some time. 4 ? ? ? ? ? :
    (i) ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    (ii) ? ? ? ? ? ? ? ? ? ? ? ? ? ?
23. Consider the following electric circuit. 4
    

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    Calculate :
    (a) The reading of ideal ammeter A in the circuit.
    (b) The reading of voltmeter V connected across 3 O resistor.
    ? ? ? ? ? ? ? ? :
    

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    ? ? :
    (a) ? ? ? ? ? A ? ?
    (b) 3O ? ? ? ? ? ? V ? ?
24. (a) State (i) law of constant proportion and (ii) multiple proportion
    

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    (b) Nitrogen forms three oxides : NO, NO2 and N2O3. Show that these obey law of multiple proportion.
    [Given: At. mass N=14 u, O=16 u] 4 (a) (i) ? ? ? ? (ii) ? ? ? ? ? ?
    (b) ? ? ? ? ? ? ? ? : NO, NO2 ? N2O3 ? ? ? ? ? ? ? ? ? ? ?
    [? ? : ? ? At. mass N = 14 u, O=16 u]
25. Explain the postulates of Bohr's model of atom. How does this model of atom explain the stability of the atom ? 4 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

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26. What is the difference between multiple cropping and mixed cropping? Explain why these two methods are considered better from the perspective of food security ? 4 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
27. Consider the following chemical reaction and answer the questions that follow :
    H2(g) + Cl2(g) ? 2 HCl (g)
    (i) Which substance has been oxidized and why ?
    (ii) Which substance has been reduced and why ?
    

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    (iii) Which substance is acting as oxidising agent and why ?
    (iv) Which substance is acting as reducing agent and why ?
    (v) Name the type of chemical reaction. 4 ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
    H2(g) + Cl2(g) ? 2 HCl (g)
    (i) ? ? ? ? ? ? ? ? ? ?
    

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    (ii) ? ? ? ? ? ? ? ? ? ?
    (iii) ? ? ? ? ? ? ? ?
    (iv) ? ? ? ? ? ? ? ?
    (v) ? ? ? ? ?
28. List the nutrients which are part of a balanced diet. How does each of these nutrients keep us healthy ? Deficiency of which nutrient in the diet causes‘Kwashiorkor' disease in the children? 6 FirstRanker.com ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? '?' ? ? ?

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29. (a) Explain the principle of working of an electric generator. Draw a labelled diagram showing different parts of a D.C. generator.
    (b) Can electric current be generated by rotating the magnets and keeping the coil of wire stationary in a generator ? Give reason for your answer. 6 (a) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    (b) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
30. Write main characteristics of the following types of elements. Where are they located in the modern periodic table ?
    (i) Metalloids
    

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    (ii) Transition elements
    (iii) Noble gases
    (iv) Main group elements 6 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    (i) ?
    (ii) ? ?
    

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    (iii) ? ?
    (iv) ? ? ?

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