10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 9

10th Standard

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Science

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

    Part A

    35 x 1 = 35
  1. Plotting a graph for momentum on the X-axis and time on Y-axis. slope of momentum- time graph gives

    (a)

    Impulsive force

    (b)

    Acceleration

    (c)

    Force

    (d)

    Rate of force

  2. Mixing sugar in a glass of milk using a spoon is ______

    (a)

    force

    (b)

    momentum

    (c)

    inertia of motion

    (d)

    inertia of direction

  3. The acceleration in a body is due to

    (a)

    balanced force

    (b)

    unbalanced force

    (c)

    equilibriant

    (d)

    couple

  4. The value of g

    (a)

    increases as we go above the earth's surface

    (b)

    decreases as we go to the centre of the earth

    (c)

    remains constant

    (d)

    is more at equator and less at poles

  5. Power of a lens is –4D, then its focal length is

    (a)

    4m

    (b)

    –40m

    (c)

    –0.25 m

    (d)

    –2.5 m

  6. When light travels from rarer to denser medium, the refracted ray is ______  the normal.

    (a)

    bent away

    (b)

    along

    (c)

    bent towards

    (d)

    just grazes the surface of separation

  7. Highly enlarged image is obtained by convex lens when object is at

    (a)

    infinity

    (b)

    F

    (c)

    below F & C

    (d)

    beyond 2F

  8. The defect of myopia can be corrected by using

    (a)

    Concave

    (b)

    Convex

    (c)

    Combination of lenses

    (d)

    None

  9. To increase the magnification of the telescope, the focal length of the ______

    (a)

    Objective lens is small and eye lens is large

    (b)

    Objective lens is large and eye lens is small

    (c)

    Objective lens and eye lens are small

    (d)

    Objective lens and eye lens are large

  10. If a substance is heated or cooled, the change in mass of that substance is

    (a)

    positive

    (b)

    negative

    (c)

    zero

    (d)

    none of the above

  11. Linear expansion is the change in _____ when object is heated or cooled.

    (a)

    length

    (b)

    area

    (c)

    volume

    (d)

    density

  12. The resistance of material depends on.

    (a)

    Temperature

    (b)

    Length of conductor

    (c)

    Area of cross-section

    (d)

    All the above

  13. A heating element used in the electric iron box and the electric heater is

    (a)

    Tungsten

    (b)

    Nichrome

    (c)

    Lead

    (d)

    All the above

  14. When a sound wave travels through air, the air particles

    (a)

    vibrate along the direction of the wave motion

    (b)

    vibrate but not in any fixed direction

    (c)

    vibrate perpendicular to the direction of the wave motion

    (d)

    do not vibrate

  15. Infrasound can be heard or produced by

    (a)

    dog

    (b)

    bat

    (c)

    rhinoceros

    (d)

    human beings

  16. ____________ isotope is used for the treatment of cancer.

    (a)

    Radio Iodine

    (b)

    Radio Cobalt

    (c)

    Radio Carbon

    (d)

    Radio Nickel

  17. A chain reaction is continuous due to

    (a)

    large mass defect

    (b)

    large energy

    (c)

    production of more neutrons in fission

    (d)

    None of these

  18. __________ is fissionable by neutrons of all energies.

    (a)

    U235

    (b)

    U238

    (c)

    U239

    (d)

    Np239

  19. In the nucleus of 20Ca40, there are 

    (a)

    20 protons and 40 neutrons

    (b)

    20 protons and 20 neutrons

    (c)

    20 protons and 40 electrons

    (d)

    40 protons and 20 electrons

  20. 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

  21. Volume ofa gas at STP is 1.12 x 10-7 cc Calculate the number of molecules in it:

    (a)

    3.01 x 1020

    (b)

    3.01 x 1015

    (c)

    3.01 X 1023

    (d)

    3.01 x 1024

  22. The number of components in a binary solution is _____________

    (a)

    2

    (b)

    3

    (c)

    4

    (d)

    5

  23. 40 g of sodium chloride in 100 g of water at 250 C forms ________ solution.

    (a)

    Super saturated

    (b)

    Unsaturated

    (c)

    Saturated

    (d)

    Both (a) and (b)

  24. An example for a solution containing liquid solute in gas solvent is ____________

    (a)

    soda water

    (b)

    cloud

    (c)

    cork

    (d)

    smoke

  25. Which of the following represents a precipitation reaction?

    (a)

    A(s) + B(s) → C(s) + D(s)

    (b)

    A(s) + B(aq) → C(aq) + D(l)

    (c)

    A(aq) + B(aq) → C(s) + D(aq)

    (d)

    A(aq) + B(s) → C(aq) + D(l)

  26. Which of the following reactions is not feasible?

    (a)

    Zn + CuSO4 ⟶ ZnSO4 + Cu

    (b)

    2Ag + Cu (NO3)2  ⟶ AgNO3 + Cu

    (c)

    Fe + CuSO4 ⟶ FeSO4 + Cu

    (d)

    Mg + 2HCI ⟶ MgCl2+ H2

  27. Which of the following are used as anaesthetics?

    (a)

    Carboxylic acids

    (b)

    Ethers

    (c)

    Esters

    (d)

    Aldehydes

  28. The sodium salt of long chain fatty acid which helps in cleaning of clothes is ________________

    (a)

    vinegar

    (b)

    detergent

    (c)

    soap

    (d)

    both (b) and (c)

  29. There are ________ pairs of cranial nerves and _______ pairs of spinal nerves.

    (a)

    12, 31

    (b)

    31, 12

    (c)

    12, 13

    (d)

    12, 21

  30. _____ is called Stress hormone.

    (a)

    Auxin

    (b)

    Gibberellin

    (c)

    Cytokinin

    (d)

    ABA

  31. _____ helps in the breakdown of glycogen to glucose in the liver.

    (a)

    Ephinephrine

    (b)

    Norepinephrine

    (c)

    Glucagon

    (d)

    Insulin

  32. ________is a disc shaped structure.

    (a)

    Uterus

    (b)

    Placenta

    (c)

    Ovary

    (d)

    Sperm

  33. The region of the chromosome where the spindle fibres get attached during cell division

    (a)

    Chromomere

    (b)

    Centrosome

    (c)

    Centromere

    (d)

    Chromonema

  34. _________ or sediments fill the hollow depression and forms a cast.

    (a)

    Rocks

    (b)

    Sand

    (c)

    Soil

    (d)

    Minerals

  35. Metastasis is associated with

    (a)

    Malignant tumour

    (b)

    Benign tumour

    (c)

    Both (a) and (b)

    (d)

    Crown gall tumour

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