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

10th Standard

    Reg.No. :
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Science

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

    Part A

    35 x 1 = 35
  1. The unit of ‘g’ is m s-2. It can be also expressed as

    (a)

    cm s-1

    (b)

    N kg-1

    (c)

    N m2 kg-1

    (d)

    cm2 s-2

  2. Gravitational, magnetic and electro magnetic forces are example for _______ force.

    (a)

    Contact

    (b)

    Non - contact

    (c)

    Balanced

    (d)

    Unbalanced

  3. Which of the following lens would you prefer to use while reading small letters found in a dictionary?

    (a)

    A convex lens of focal length 5 cm

    (b)

    A concave lens of focal length 5 cm

    (c)

    A convex lens of focal length 10 cm

    (d)

    A concave lens of focal length 10 cm

  4. 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

  5. Kilowatt hour is the unit of

    (a)

    resistivity

    (b)

    conductivity

    (c)

    electrical energy

    (d)

    electrical power

  6. 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

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

    (a)

    Lead oxide

    (b)

    Iron

    (c)

    Lead

    (d)

    Aluminium

  8. Which of the following represents 1 amu?

    (a)

    Mass of a C – 12 atom

    (b)

    Mass of a hydrogen atom

    (c)

    1/12th of the mass of a C – 12 atom

    (d)

    Mass of O – 16 atom

  9. _____ is a relative periodic property

    (a)

    atomic radii

    (b)

    ionic radii

    (c)

    electron affinity

    (d)

    electronegativity

  10. ______ is an important metal to form amalgam

    (a)

    Ag

    (b)

    Hg

    (c)

    Mg

    (d)

    Al

  11. 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

  12. The reaction between carbon and oxygen is represented by C(s) + O2(g) → CO2(g) + Heat. In which of the type(s), the above reaction can be classified?
    (i) Combination Reaction
    (ii) Combustion Reaction
    (iii)Decomposition Reaction
    (iv) Irreversible Reaction

    (a)

    i and ii

    (b)

    i and iv

    (c)

    i, ii and iii

    (d)

    i, ii and iv

  13. Rectified spirit is an aqueous solution which contains about _______ of ethanol

    (a)

    95.5 %

    (b)

    75.5 %

    (c)

    55.5 %

    (d)

    45.5 %

  14. Oxygen is produced at what point during photosynthesis ?

    (a)

    when ATP is converted to ADP

    (b)

    when CO2 is fixed

    (c)

    when H2O is splitted

    (d)

    All of these

  15. The body of leech has

    (a)

    23 segments

    (b)

    23 segments

    (c)

    38 segments

    (d)

    30 segments

  16. ‘Heart of heart’ is called

    (a)

    SA node

    (b)

    AV node

    (c)

    Purkinje fibres

    (d)

    Bundle of His

  17. Vomiting centre is located in

    (a)

    medulla oblongata

    (b)

    stomach

    (c)

    cerebrum

    (d)

    hypothalamus

  18. Identify the exocrine gland

    (a)

    Pituitary gland

    (b)

    Adrenal gland

    (c)

    Salivary gland

    (d)

    Thyroid gland

  19. ______ is a powerful inhibitor of lateral bud growth in Tomato.

    (a)

    Auxin

    (b)

    Cytokinin

    (c)

    ABA

    (d)

    Ethylene

  20. ______ is the hormone secreted by Thymus.

    (a)

    Thymosin

    (b)

    Estrogen

    (c)

    Testosterone

    (d)

    Progesterone

  21. Estrogen is secreted by

    (a)

    Anterior pituitary

    (b)

    Primary follicle

    (c)

    Graffian follicle

    (d)

    Graffian follicle

  22. _______from anterior pituitary stimulates milk secretion

    (a)

    Oxytocin

    (b)

    Prolactin

    (c)

    Progestrone

    (d)

    Oestrogen

  23. ________is a disc shaped structure.

    (a)

    Uterus

    (b)

    Placenta

    (c)

    Ovary

    (d)

    Sperm

  24. The loss of one or more chromosome in a ploidy is called_____________.

    (a)

    Tetraploidy

    (b)

    Aneuploidy

    (c)

    Euploidy

    (d)

    polyploidy

  25. ______is not a nitrogenous base.

    (a)

    Adenine

    (b)

    Thymine

    (c)

    Leucine

    (d)

    Cytosine

  26. The best way of direct dating fossils of recent origin is by

    (a)

    Radio-carbon method

    (b)

    Uranium lead method

    (c)

    Potassium-argon method

    (d)

    Both (a) and (c)

  27. Biogenesis was speculated by _________.

    (a)

    Haldane

    (b)

    Pasteur

    (c)

    Darwin

    (d)

    Lamarck

  28. The process of formation of fossils in the rocks is called ________.

    (a)

    calcification

    (b)

    crystallization

    (c)

    petrification

    (d)

    fossilization

  29. DNA fingerprinting is based on the principle of identifying _______ sequences of DNA

    (a)

    single stranded

    (b)

    mutated

    (c)

    polymorphic

    (d)

    repititive

  30. Pusa sawani is a insect resistant variety of __________

    (a)

    cowpea

    (b)

    flat bean

    (c)

    lady's finger

    (d)

    brassica

  31. Metastasis is associated with

    (a)

    Malignant tumour

    (b)

    Benign tumour

    (c)

    Both (a) and (b)

    (d)

    Crown gall tumour

  32. ______________ is a symptom of CHD.

    (a)

    Glycosuria

    (b)

    Ischemia

    (c)

    Hyperglycemia

    (d)

    Polyphagia

  33. Common energy source in village is

    (a)

    electricity

    (b)

    coal

    (c)

    biogas

    (d)

    wood and animal dung

  34. The Chipko movement originated in_________

    (a)

    Uttar pradesh

    (b)

    Uttarakhand

    (c)

    Arunachal Pradesh

    (d)

    Madhya Pradesh

  35. In Scratch, the characters are known as_________

    (a)

    Sprite

    (b)

    Stage

    (c)

    Element

    (d)

    Script

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