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

10th Standard

    Reg.No. :
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Science

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

    Part A

    35 x 1 = 35
  1. Which of the following correctly represent 360 g of water
    (i) 2 moles of H2O
    (ii) 20 moles of water
    (iii) 6.023 x 1023molecules of water
    (iv) 1.2046 x 1024molecules of water

    (a)

    (i)

    (b)

    (i) and (iv)

    (c)

    (ii) and (iii)

    (d)

    (ii) and (iv)

  2. The total number of atoms represented by the compound CuSO4. 5H2O is

    (a)

    27

    (b)

    21

    (c)

    5

    (d)

    8

  3. The gram molecular mass of CO2 is

    (a)

    16g

    (b)

    18g

    (c)

    44g

    (d)

    17g

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

    (a)

    1

    (b)

    2

    (c)

    3

    (d)

    8

  5. Electronegativity values are based on ______________

    (a)

    bond energy

    (b)

    electron affinity

    (c)

    ionisation energy

    (d)

    all the above

  6. Blister copper contains _________

    (a)

    50% pure copper

    (b)

    99% pure copper and 1% impurities

    (c)

    98% pure copper and 2% impurities

    (d)

    75% pure copper and 25% impurities

  7. Solubility of a solute is governed by

    (a)

    nature of solute and solvent

    (b)

    temperature

    (c)

    pressure

    (d)

    all the above

  8. Non-aqueous solvent is ____________

    (a)

    benzene

    (b)

    ether

    (c)

    CS2

    (d)

    All the above

  9. Which of the following is a dehydrating agent (absorbs moistone)

    (a)

    sodium hydroxide

    (b)

    anhydrous calcium chloride

    (c)

    sugar

    (d)

    None of these

  10. Which among the following chemical reaction is an example of combination reaction?
    (i) H2(g)+ CI2(g) ⟶ 2HCI(g)
    (ii) AnOH(aq) + HCl(aq) ⟶ NaCl(aq) + H2O(1)
    (iii)2Mg(S)+ O2(g) ⟶ 2MgO(S)
    (iv) Zn(S)+ 2HCI(aq) ⟶ ZnCl2 + H2(g)

    (a)

    only (i)

    (b)

    both (i) and (iii)

    (c)

    only (iii)

    (d)

    both (i) and (ii)

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

    (a)

    neutralization

    (b)

    Precipitation

    (c)

    decomposition

    (d)

    Combustion

  12. Copper displaces - metal from its solution.

    (a)

    Zn

    (b)

    AI

    (c)

    Ag

    (d)

    all the above

  13. Rectified spirit contains

    (a)

    95.5% of ethanol and 4.5% of water

    (b)

    100 % pure alcohol

    (c)

    4.5% of ethanol and 95.5% of water

    (d)

    50% of ethanal and 50% of water

  14. The organic acid present in Vinegar is ___________ acid.

    (a)

    methanoic

    (b)

    ethanoic

    (c)

    Propanoic

    (d)

    Butanoic

  15. The opening of pulmonary arch into right ventricle of rabbit is guarded by_________ semilunar valves.

    (a)

    2

    (b)

    4

    (c)

    3

    (d)

    1

  16. Two chambered heart is seen in__________

    (a)

    fish

    (b)

    amphibian

    (c)

    reptiles

    (d)

    mammals

  17. The other name of red blood corpuscles is _________

    (a)

    erythrocytes

    (b)

    leucocytes

    (c)

    granulocytes

    (d)

    agranulocytes

  18. _____ is an inflammation of the meninges.

    (a)

    Meningitis

    (b)

    Myelin sheath

    (c)

    Piameter

    (d)

    Arachnoid membrane

  19. ______ is a growth inhibitor.

    (a)

    Auxin

    (b)

    GA

    (c)

    Cytokinin

    (d)

    Ethylene

  20. _____ helps in the contraction of the smooth muscles of uterus at the time of child birth.

    (a)

    Oxytocin

    (b)

    Prolactin

    (c)

    FSH

    (d)

    GTH

  21. The other name of Antidiuretic hormone is

    (a)

    vasopressin

    (b)

    oxytocin

    (c)

    prolactin

    (d)

    growth hormone

  22. _______takes place after implantation.

    (a)

    Cleavage

    (b)

    Fertilization

    (c)

    Gastrulation

    (d)

    Organogenesis

  23. An oocyte is alive for about________ after it is released from the follicle

    (a)

    24hours

    (b)

    12hours

    (c)

    15hours

    (d)

    20 hours

  24. Theejection of milk is stimulated byposterior pituitary hormone called_____

    (a)

    Prolactin

    (b)

    Insulin

    (c)

    Oxytocin

    (d)

    Estrogen

  25. Franklin and Wilkin were awarded nobel prize for_______

    (a)

    studying DNA replication

    (b)

    studying about RNA

    (c)

    X - ray diffraction studies of DNA.

    (d)

    isolating DNA

  26. ________ is not an example of vestigial organ.

    (a)

    Coccyx

    (b)

    Appendix

    (c)

    Thick hair

    (d)

    Nictitating membrane

  27. Radioactive Carbon (C14) dating method was discovered by_________

    (a)

    w. F.Libby

    (b)

    Niels Bohr

    (c)

    Issac Newton

    (d)

    William Harvey

  28. The International rice research institute is located at___________.

    (a)

    New Delhi

    (b)

    Mexico

    (c)

    Phillipines

    (d)

    China

  29. DNA finger printing was developed by

    (a)

    Dr. Ian Wilmut

    (b)

    Alec Jeffrey

    (c)

    Lilly

    (d)

    Dr. Norman

  30. ____________ is not a method of treatment for cancer.

    (a)

    Surgery

    (b)

    Immunotherapy

    (c)

    Vasectomy

    (d)

    Radiation therapy

  31. Forest conservation Act was passed in__________

    (a)

    1952

    (b)

    1958

    (c)

    1978

    (d)

    1980

  32. __________is not obtained from petroleum.

    (a)

    Biogas

    (b)

    Diesel

    (c)

    Gasoline

    (d)

    LPG

  33. Notes can be collected, edited and printed using______

    (a)

    Paint

    (b)

    Scratch

    (c)

    Notepad

    (d)

    LINUX

  34. Which button is presses to run the script?

    (a)

    Green flag

    (b)

    Red flag

    (c)

    Blue flag

    (d)

    Yellow flag

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