10th Standard Science English Medium Free Online Test Book Back 1 Mark Questions Part - Two

10th Standard

    Reg.No. :
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Science

Time : 00:20:00 Hrs
Total Marks : 20

    Part A

    20 x 1 = 20
  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. 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

  3. Temperature is the average ______ of the molecules of a substance

    (a)

    difference in K.E and P.E

    (b)

    sum of P.E and K.E

    (c)

    difference in T.E and P.E

    (d)

    difference in K.E and T.E

  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. If a sound wave travels with a frequency of 1.25 x 104 Hz 344 ms-1, the wavelength will be 

    (a)

    27.52 m

    (b)

    275.2 m

    (c)

    0.02752 m

    (d)

    2.752 m

  6. Gamma radiations are dangerous because

    (a)

    it affects eyes & bones

    (b)

    it affects tissues

    (c)

    it produces genetic disorder

    (d)

    it produces enormous amount of heat

  7. Which of the following is a triatomic molecule?

    (a)

    Glucose

    (b)

    Helium

    (c)

    Carbon dioxide

    (d)

    Hydrogen

  8. The basis of modern periodic law is__________

    (a)

    atomic number

    (b)

    atomic mass

    (c)

    isotopic mass

    (d)

    number of neutrons

  9. Neon shows zero electron affinity due to _____.

    (a)

    stable arrangement of neutrons

    (b)

    stable configuration of electrons

    (c)

    reduced size

    (d)

    increased density

  10. When pressure is increased at constant temperature the solubility of gases in liquid

    (a)

    No change

    (b)

    increases

    (c)

    decreases

    (d)

    no reaction

  11. A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    iii and iv

    (d)

    i and iv

  12. TFM in soaps represents ___________ content in soap

    (a)

    mineral

    (b)

    vitamin

    (c)

    fatty acid

    (d)

    carbohydrate

  13. Pharyngeal ganglion in leech is a part of

    (a)

    Excretory system

    (b)

    Nervous system

    (c)

    Reproductive system

    (d)

    Respiratory system

  14. The wall of human heart is made of

    (a)

    Endocardium

    (b)

    Epicardium

    (c)

    Myocardium

    (d)

    All 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

  16. LH is secreted by

    (a)

    Adrenal gland

    (b)

    Thyroid gland

    (c)

    Anterior pituitary

    (d)

    Hypothalamus.

  17. Estrogen is secreted by

    (a)

    Anterior pituitary

    (b)

    Primary follicle

    (c)

    Graffian follicle

    (d)

    Graffian follicle

  18. The ‘use and disuse theory’ was proposed by __________.

    (a)

    Charles Darwin

    (b)

    Ernst Haeckel

    (c)

    Jean Baptiste Lamarck

    (d)

    Gregor Mendel

  19. World 'No Tobacco Day' is observed on

    (a)

    May 31

    (b)

    June 6

    (c)

    April 22

    (d)

    October 2

  20. Green house effect refers to

    (a)

    cooling of earth

    (b)

    trapping of UV rays

    (c)

    cultivation of plants

    (d)

    warming of earth

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