10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 4

10th Standard

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Science

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

    Part A

    35 x 1 = 35
  1. In which of the following sport the turning of effect of force used

    (a)

    swimming

    (b)

    tennis

    (c)

    cycling

    (d)

    hockey

  2. A & B are two objects with masses 100 kg & 75 kg respectively, then _______

    (a)

    both will have same inertia

    (b)

    B'will have more inertia

    (c)

    A will have more inertia

    (d)

    both will have less inertia

  3. The gravitational force of earth acting on a body of mass 1 kg is ___________

    (a)

    8.9 N

    (b)

    9.8 N

    (c)

    980 N

    (d)

    1 N

  4. In a myopic eye, the image of the object is formed

    (a)

    behind the retina

    (b)

    on the retina

    (c)

    in front of the retina

    (d)

    on the blind spot

  5. In spherical lenses, all distance are measured from

    (a)

    optic centre

    (b)

    principal focus

    (c)

    principal axis

    (d)

    centre of curvature

  6. Cylindrical lens is used to correct

    (a)

    Myopia

    (b)

    Hypermetropia

    (c)

    Presbyopia

    (d)

    Astigmatism

  7. If resistance of a wire is r ohms and wire is stretched to double its length, then what is its resistance?

    (a)

    r

    (b)

    2r

    (c)

    4r

    (d)

    r/2

  8. Ultrasound waves compared to audible sound waves have.

    (a)

    Lower frequency and Shorter wavelength

    (b)

    Lower frequency and longer wavelength

    (c)

    higher frequency and longer wavelength

    (d)

    higher frequency and shorter wavelength

  9. Man-made radioactivity is also known as

    (a)

    Induced radioactivity

    (b)

    Spontaneous radioactivity

    (c)

    Artificial radioactivity

    (d)

    a & c

  10. Henry Becquerel discovered ________ in 1896

    (a)

    nucleus

    (b)

    atom

    (c)

    isotopes

    (d)

    radioactivity

  11. Controlled chain reaction is seen in _________.

    (a)

    atom bombs

    (b)

    nuclear reactors

    (c)

    synchrotron

    (d)

    detectors

  12. Th e volume occupied by 4.4 g of CO2 at S.T.P

    (a)

    22.4 litre

    (b)

    2.24 litre

    (c)

    0.24 litre

    (d)

    0.1 litre

  13. What is the mass of 12.044 x 1023 number of O2 molecules?

    (a)

    8g

    (b)

    16 g

    (c)

    32 g

    (d)

    64 g

  14. The weight of a molecule of the compound C60H122 is:

    (a)

    1.4 x 10-21g

    (b)

    1.09 x 10-21g

    (c)

    5.025 X 1023g

    (d)

    16.023 x 1023g

  15. Neon shows zero electron affinity due to _____.

    (a)

    stable arrangement of neutrons

    (b)

    stable configuration of electrons

    (c)

    reduced size

    (d)

    increased density

  16. The first period of the modern periodic table has ________ elements.

    (a)

    1

    (b)

    2

    (c)

    3

    (d)

    8

  17. A 25% alcohol solution means 

    (a)

    25 ml alcohol in 100 ml of water

    (b)

    25 ml alcohol in 25 ml of water

    (c)

    25 ml alcohol in 75 ml of water

    (d)

    75 ml alcohol in 25 ml of water

  18. Sugar and copper sulphate crystals are dissolved in water. The solution is called as

    (a)

    binary

    (b)

    trinary

    (c)

    ternary

    (d)

    quartenary

  19. Solubility of KNO3 ____________ with the increases in temperature.

    (a)

    increases

    (b)

    decreases

    (c)

    remains constant

    (d)

    None of these

  20. The pH of a solution is 3. Its [OH–] concentration is

    (a)

    1 × 10–3 M

    (b)

    3M

    (c)

    1 × 10–11 M

    (d)

    11 M

  21. Pb(NO3)2 + 2KI ⟶ Pbl2 + 2KNO3 is a ______________ reaction

    (a)

    neutralization

    (b)

    Precipitation

    (c)

    decomposition

    (d)

    Combustion

  22. Which of the unique feature (s) of Carbon enables it to form a large number of compounds?

    (a)

    catenation

    (b)

    covalency

    (c)

    tetra valency

    (d)

    both (a) and (c)

  23. Which is formed during anaerobic respiration

    (a)

    Carbohydrate

    (b)

    Ethyl alcohol

    (c)

    Acetyl CoA

    (d)

    Pyruvate

  24. Mitochondria contain _______________ of protein.

    (a)

    70 - 80%

    (b)

    80 - 90%

    (c)

    60 -70 %

    (d)

    50 - 60 %

  25. Mammals are ______________ animals.

    (a)

    Cold blooded

    (b)

    Warm blooded

    (c)

    Poikilothermic

    (d)

    All the above

  26. PNSis formed of _______pairs of cranial nerves in Rabbit

    (a)

    10

    (b)

    12

    (c)

    14

    (d)

    16

  27. The wall of human heart is made of

    (a)

    Endocardium

    (b)

    Epicardium

    (c)

    Myocardium

    (d)

    All of the above

  28. Water from soil enters the root hairs due to___________

    (a)

    capillary Action

    (b)

    capillary Action

    (c)

    adhesion

    (d)

    osmosis

  29. Which nervous band connects the two cerebral hemispheres of brain?

    (a)

    thalamus

    (b)

    hypothalamus

    (c)

    corpus callosum

    (d)

    pons

  30. _____ is an inflammation of the meninges.

    (a)

    Meningitis

    (b)

    Myelin sheath

    (c)

    Piameter

    (d)

    Arachnoid membrane

  31. LH is secreted by

    (a)

    Adrenal gland

    (b)

    Thyroid gland

    (c)

    Anterior pituitary

    (d)

    Hypothalamus.

  32. _______ is the only planet in the Goldilock. zone.

    (a)

    Jupiter

    (b)

    Mars

    (c)

    Earth

    (d)

    Venus

  33. World AIDS Day is observed on ______________

    (a)

    1st December

    (b)

    15th December

    (c)

    24th November

    (d)

    1st May 

  34. An inexhaustible resources is

    (a)

    wind power

    (b)

    soil fertility

    (c)

    wild life

    (d)

    all of the above

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