10th Standard English Medium Science Subject Book Back 1 Mark Questions with Solution Part - I

10th Standard

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Science

Time : 00:30:00 Hrs
Total Marks : 15
    15 x 1 = 15
  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. Magnification of a convex lens is

    (a)

    Positive

    (b)

    negative

    (c)

    either positive or negative

    (d)

    zero

  3. If a substance is heated or cooled, the linear expansion occurs along the axis of

    (a)

    X or –X

    (b)

    Y or –Y

    (c)

    both (a) and (b)

    (d)

    (a) or (b)

  4. In a simple circuit, why does the bulb glow when you close the switch?

    (a)

    The switch produces electricity

    (b)

    Closing the switch completes the circuit.

    (c)

    Closing the switch breaks the circuit.

    (d)

    The bulb is getting charged.

  5. The velocity of sound in air at a particular temperature is 330 ms-1. What will be its value when temperature is doubled and the pressure is halved?

    (a)

    330 ms-1

    (b)

    165 ms-1

    (c)

    330 x \(\sqrt { 2 } \) ms-1

    (d)

    320/\(\sqrt { 2 } \) ms-1

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

    (a)

    Radio Iodine

    (b)

    Radio Cobalt

    (c)

    Radio Carbon

    (d)

    Radio Nickel

  7. Which of the following statement is incorrect?

    (a)

    12 gram of C – 12 contains Avogadro’s number of atoms.

    (b)

    One mole of oxygen gas contains Avogadro’s number of molecules

    (c)

    One mole of hydrogen gas contains Avogadro’s number of atoms

    (d)

    One mole of electrons stands for 6.023 × 1023 electrons.

  8. Chemical formula of rust is ________.

    (a)

    FeO.xH2O

    (b)

    FeO4.xH2O

    (c)

    Fe2O3.xH2O

    (d)

    FeO

  9. Identify the non aqueous solution.

    (a)

    sodium chloride in water

    (b)

    glucose in water

    (c)

    copper sulphate in water

    (d)

    sulphur in carbon di sulphide

  10. Photolysis is a decomposition reaction caused by __________

    (a)

    heat

    (b)

    electricity

    (c)

    light

    (d)

    mechanical energy

  11. Which of the following pairs can be the successive members of a homologous series?

    (a)

    C3H8 and C4H10

    (b)

    C2H2 and C2H4

    (c)

    CH4 and C3H6

    (d)

    C2H5OH and C4H8OH

  12. The endarch condition is the characteristic feature of

    (a)

    root

    (b)

    stem

    (c)

    leaves

    (d)

    flower

  13. The segments of leech are known as

    (a)

    Metameres (somites)

    (b)

    Proglottids

    (c)

    Strobila

    (d)

    All the above

  14. During transpiration there is loss of

    (a)

    Carbon dioxide

    (b)

    Oxygen

    (c)

    Water

    (d)

    None of the above

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

    (a)

    12, 31

    (b)

    31, 12

    (c)

    12, 13

    (d)

    12, 21

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