Creative Questions Part-X

10th Standard

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Science

Time : 01:30:00 Hrs
Total Marks : 100

    Part-A

    23 x 1 = 23
  1. The magnitude of the weight is expressed in the units of

    (a)

    displacement

    (b)

    mass (kg)

    (c)

    force (Newton)

    (d)

    none

  2. An object is placed at 12 cm from a convex lens whose focal length is 10 cm. The image must

    (a)

    Virtual and enlarged

    (b)

    real and reduced in size

    (c)

    virtual and reduced size

    (d)

    real and enlarged size

  3. The degree of hotness or coldness of a body is called _____

    (a)

    Energy

    (b)

    Thermal energy

    (c)

    Temperature

    (d)

    Heat capacity

  4. The S1 unit of power is

    (a)

    joule

    (b)

    ampere

    (c)

    Watt

    (d)

    ohm

  5. Bats deflect from the obstacles in their path by receiving the reflected _______ waves.

    (a)

    radio

    (b)

    ultrasonic

    (c)

    electromagnetic

    (d)

    infrasonic

  6. _______ rays contain 1 - unit of negative charge.

    (a)

    Alpha

    (b)

    Beta

    (c)

    Gamma

    (d)

    Hydrogen

  7. Atoms of different elements with different atomic numbers, but same mass number are known as _________

    (a)

    isobars

    (b)

    isotopes

    (c)

    isotones

    (d)

    isomers

  8. Metals are ______________

    (a)

    Electro positive

    (b)

    Electronegative

    (c)

    both (a) and (b)

    (d)

    neither (a) nor (b)

  9. Quick lime is dissolved in water is a ______________ process.

    (a)

    exothermic

    (b)

    endothermic

    (c)

    reversible

    (d)

    both (a) and (b)

  10. When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________

    (a)

    CO

    (b)

    CO2

    (c)

    H2

    (d)

    H2O

  11. According to IUPAC rules, the secondary suffix used to represent carboxylic acids is  _________________.

    (a)

    al

    (b)

    ol

    (c)

    ate

    (d)

    oic

  12. Leeches have ___________

    (a)

    heart

    (b)

    lungs

    (c)

    true blood vessels

    (d)

    excretory organs

  13. Identify the wrong statement

    (a)

    Guttation occurs through stomata

    (b)

    Water molecules stick to xylem because of adhesion

    (c)

    Stoma closeswhen guard cells are not turgid

    (d)

    Elements like calcium are not remobilised

  14. _____ second largest part of the brain formed of two large sized hemispheres.

    (a)

    Cerebellum

    (b)

    Cerebrum

    (c)

    Thalamus

    (d)

    Diencephalon

  15. ______ is not a function of thyroid.

    (a)

    BMR

    (b)

    Body temperature

    (c)

    Carbo hydratemetabolism

    (d)

    Anti-allergic

  16. Which is an example of self - pollination

    (a)

    Hibiscus

    (b)

    Grasses

    (c)

    Apples

    (d)

    Rose

  17. The enzyme called________ bind to the origin of replication site.

    (a)

    Replicase

    (b)

    Helicase

    (c)

    Amylase

    (d)

    Ligase

  18. _________ is called the Father of Palaeontology.

    (a)

    Pasteur

    (b)

    Birbal sahani

    (c)

    Haeckel

    (d)

    Leonardo da vinci

  19. _________ is an example of auto triploid

    (a)

    Coffee

    (b)

    Banana

    (c)

    Potato

    (d)

    Peanut

  20. ______________ is not related to NIDDM.

    (a)

    Insulin administration

    (b)

    Controlled by medicine

    (c)

    Obese

    (d)

    Insulin action impaired

  21. __________is not obtained from petroleum.

    (a)

    Biogas

    (b)

    Diesel

    (c)

    Gasoline

    (d)

    LPG

  22. Notes can be collected, edited and printed using______

    (a)

    Paint

    (b)

    Scratch

    (c)

    Notepad

    (d)

    LINUX

  23. Part-B

    23 x 2 = 46
  24. What is meant by natural motion?

  25. A convex lens of refractive in μ1 is kept in a medium of refractive index (μ2).A parallel beam of light is incident on the lens. Draw the path of the rays of light emerging from a lens. If
    (a) μ1 > μ2
    (b) μ1 = μ2
    (c) μ1 < μ2

  26. What is meant by real expansion?

  27. Two electric circuits I and II are shown in figure.
    (i) Which of the two circuits has more resistance?
    (ii) Through which circuit, more current passes?
    (iii) In which circuit, the potential difference across each resistor is equal.

  28. Why does sound travel faster in solids than in gases?

  29. What is Nuclear Fusion?

  30. Pick out the heteronudear polyatomic molecules among the following and dassify them based on their atomicity.
    C6H12O6, Cl2, NH3, HCl, N2CO, O3, NH4Cl, CaCO3, O2, SO2

  31. Name a metal that can be cut with a knife.

  32. What is (a) Blue vitriol (b) Epsom

  33. What happens during a chemical change?

  34. Write the uses of ethanoic acid.

  35. Draw the ultrastructure of mitochondria and label the parts.

  36. Write a note on female reproductive system of rabbit

  37. Write the components of the blood.

  38. What is a neurotransmitter?

  39. Placing a ripe apple in a bag of green bananas will cause them to ripen quickly. This occurs) because the apple:
    a. Absorbs cytokinin
    b. Forms digestive enzymes
    c. Lacks Auxin
    d. Produces ethylene

  40. Mention the significance of fertilization?

  41. List any three traits of pea plant selected by Mendel for his experiments and mention their dominant & recessive form

  42. What is theory of Cosmic origin?

  43. Differentiate Embryonic and Adult stem cells.

  44. Mention some behavioural changes seen in drug users.

  45. Mention the advantages of using tidal energy.

  46. Write a note on 'Visual Communication Device'.

  47. Part-C

    23 x 4 = 92
  48. Derive the Relation between g and G?

  49. State the laws of refraction.

  50. With an illustration, explain the method of Calculation for linear expansion of an object.

  51. Write any five electrical components used in electrical circuit and draw its symbol.

  52. What are the various possibilities of relative motion between source and listener?

  53. Distinguish between Nuclear fission and nuclear fusion.

  54. How will you determine the atomicity of gases using Avogadro's hypothesis?

  55. How are magnetic ores separated from non magnetic impurities? Explain.

  56. Explain Solid solution, Liquid solution and Gaseous solution.

  57. Explain the classification based on the direction of the reaction.

  58. What are the advantages of detergents over soaps?

  59. Can Human beings survive with anaerobic respiration - Justify.

  60. Man is a mammal and has incisors and Ecanine.Rabbits are mammals but lack  canines. Explain.

  61. List the difference between RBC and WBC.

  62. Rani fell from her bike and had a head injury. She was hospitalized and discharged later. What do you think she could have done to save herself from this accident.

  63. Write a note on Thyroid Dysfunctions.

  64. Write a note on agents of pollination.

  65. How are chromosomes classified based on the position of centromere?

  66. X is the oldest fossil bird. The animal X became extinct a long time ago. But the study of fossils of
    X tells us that it had features like birds and some like reptiles.
    (i) Identify 'X'?
    (ii) Name one feature in which 'X' resembled birds.
    (iii) Name one feature in which 'X' resembled reptiles.

  67. Why are Genetically modified organisms produced? Explain the purpose and advantages.

  68. Write a note an prevention and control of AIDS.

  69. Write a note on biogas.

  70. In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felthe wanted a detailed explanation.
    (i) In what way the teaching can be made easily understandable?
    (ii) Do you think using technologies like Visual Communication help students to understand the difficult concepts in a simple way?
    (iii) By what means the Visual Communication improve the learning ability?

  71. Part-D

    7 x 7 = 49
  72. A 20g bullet moving at 300 m/s stops after 4. penetrating 2 cm of bone. Calculate the average force exerted by the bullet.

  73. A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Calculate the size of the image formed.

  74. A metal scale is graduated at 0°C so what would be original length of the object when measured at 25°C, reads 50 Cm? For a metal, the coefficient of linear expansion is 18 x 10-6/ °C.

  75. 100 W bulb draws 680 mA current. How much time will be required to pass 30 C of charge through the bulb?

  76. A boy hears two different sounds when a race car is moving toward and moving away. If the speed of sound in air is 340 ms-1. The frequency emitted by the car is 800 Hz and the car velocity is 120 ms-1. Find the frequency heard by the boy? (when the car moving forward).

  77. Balance the following equation.
    6C14-➝-1e0+?.

  78. Calculate the number of molecules in 11g of CO2

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