10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Eight

10th Standard

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Science

Time : 00:35:00 Hrs
Total Marks : 35

    Part A

    35 x 1 = 35
  1. Newton’s III law is applicable

    (a)

    for a body is at rest

    (b)

    for a body in motion

    (c)

    both a & b

    (d)

    only for bodies with equal masses

  2. The resistance of a body to change its state of rest is called

    (a)

    inertia of rest

    (b)

    inertia of motion

    (c)

    momentum

    (d)

    inertia of direction

  3. If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?

    (a)

    VB = VG = VR

    (b)

    VB > VG >VR

    (c)

    VB < VG < VR

    (d)

    VB < VG > VR

  4. The group of rays is ______

    (a)

    lines

    (b)

    dots

    (c)

    beam

    (d)

    none ofthese

  5. Change in volume of a solid during heating is

    (a)

    Linear expansion

    (b)

    Superficial expansion

    (c)

    Cubical expansion

    (d)

    apparent expansion

  6. The resistance of a conductor directly proportional to

    (a)

     Length

    (b)

    Area

    (c)

    Volt

    (d)

    Current

  7. Which of following relation is correct for voltage, work done and charge?

    (a)

    V=WxQ

    (b)

    W=VxQ

    (c)

    V = Q 1W

    (d)

    W = V / Q

  8. Which options show the correct direction of current?

    (a)

    (b)

    (c)

    (d)

  9. The pitch of sound depends on

    (a)

    frequency

    (b)

    amplitude

    (c)

    both

    (d)

    none

  10. _____________ aprons are used to protect us from gamma radiations

    (a)

    Lead oxide

    (b)

    Iron

    (c)

    Lead

    (d)

    Aluminium

  11. Energy generation in stars is due to

    (a)

    chemical reaction

    (b)

    fission

    (c)

    fusion of light nuclei

    (d)

    Fusion of heavy nuclei

  12. Complete the reaction: 90Th234 91Pa234+ ?

    (a)

    2He4

    (b)

    -1e0

    (c)

    1e0

    (d)

    1n0

  13. __________ is fissionable by neutrons of all energies.

    (a)

    U235

    (b)

    U238

    (c)

    U239

    (d)

    Np239

  14. The moderator used in nuclear reactor is 

    (a)

    Cadmium

    (b)

    Boron oxide

    (c)

    Heavy water

    (d)

    Uranium

  15. The volume occupied by 1 mole of a diatomic gas at S.T.P is

    (a)

    11.2 litre

    (b)

    5.6 litre

    (c)

    22.4 litre

    (d)

    44.8 litre

  16. Mass of an electron is

    (a)

    9.1083 x 10-31kg

    (b)

    9.1083 x 10-24kg

    (c)

    1.67262 x 10-27kg

    (d)

    1.67 x 10-24gm

  17. Which of the following correctly represent 360 g of water
    (i) 2 moles of H2O
    (ii) 20 moles of water
    (iii) 6.023 x 1023molecules of water
    (iv) 1.2046 x 1024molecules of water

    (a)

    (i)

    (b)

    (i) and (iv)

    (c)

    (ii) and (iii)

    (d)

    (ii) and (iv)

  18. The volume occupied by 4.4 g of CO2 at STP is:

    (a)

    22.4l

    (b)

    2.24l

    (c)

    0.224l

    (d)

    0.1l

  19. Modern periodic table contains ______ groups.

    (a)

    9

    (b)

    32

    (c)

    18

    (d)

    64

  20. Blister copper contains _________

    (a)

    50% pure copper

    (b)

    99% pure copper and 1% impurities

    (c)

    98% pure copper and 2% impurities

    (d)

    75% pure copper and 25% impurities

  21. Photolysis is a decomposition reaction caused by

    (a)

    heat

    (b)

    electricity

    (c)

    light

    (d)

    mechanical energy

  22. Decomposition reactions are brought about by ________

    (a)

    heat

    (b)

    light

    (c)

    electricity

    (d)

    all the above

  23. The secondary suffix used in IUPAC nomenclature of an aldehyde is ____

    (a)

    - ol

    (b)

    – oic acid

    (c)

    – al

    (d)

    - one

  24. General molecular formula of alkynes is ___________.

    (a)

    CnH2n+2

    (b)

    CnH2n

    (c)

    CnH2-n-2

    (d)

    CnH2n+1

  25. Kreb’s cycle takes place in

    (a)

    chloroplast

    (b)

    mitochondrial matrix

    (c)

    stomata

    (d)

    inner mitochondrial membrane

  26. Exarch and tetrarch xylem are a feature of _______________

    (a)

    dicot stem

    (b)

    dicot leaf

    (c)

    monocot root

    (d)

    dicot root

  27. Dental formula of rabbit is______

    (a)

    \(\cfrac { 2033 }{ 1023 } \)

    (b)

    \(\cfrac { 2003 }{ 1003 } \)

    (c)

    \(\cfrac { 2030 }{ 1020 } \)

    (d)

    \(\cfrac { 2023 }{ 1220 } \)

  28. Which is the sequence of correct blood flow

    (a)

    ventricle - atrium - vein - arteries

    (b)

    atrium - ventricle - veins - arteries

    (c)

    atrium - ventricle - arteries - vein

    (d)

    ventricles - vein - atrium - arteries

  29. Transpiration does not___________

    (a)

    help in ascent of sap

    (b)

    help in keeping cells turgid

    (c)

    helps in cooling leaves

    (d)

    helps in translocation

  30. Vomiting centre is located in

    (a)

    medulla oblongata

    (b)

    stomach

    (c)

    cerebrum

    (d)

    hypothalamus

  31. The plasma membrane of axon is called _____

    (a)

    axolemma

    (b)

    axoplasm

    (c)

    myelin sheath

    (d)

    schwann cells

  32. Male gametes in angiosperms are formed by the division of ___________

    (a)

    Generative cell

    (b)

    Vegetative cell

    (c)

    Microspore mother cell

    (d)

    Microspore

  33. Paleontologists deal with

    (a)

    Embryological evidences

    (b)

    Fossil evidences

    (c)

    Vestigial organ evidences

    (d)

    All the above

  34. World 'No Tobacco Day' is observed on

    (a)

    May 31

    (b)

    June 6

    (c)

    April 22

    (d)

    October 2

  35. Soil erosion can be prevented by

    (a)

    deforestation

    (b)

    afforestion

    (c)

    over growing

    (d)

    removal of vegetation

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