Periodic Classification of Elements One Mark Questions

10th Standard EM

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Science

Time : 00:30:00 Hrs
Total Marks : 20
    10 x 1 = 10
  1. The number of periods and groups in the periodic table are__________.

    (a)

    6,16

    (b)

    7,17

    (c)

    8,18

    (d)

    7,18

  2. The basis of modern periodic law is__________

    (a)

    atomic number

    (b)

    atomic mass

    (c)

    isotopic mass

    (d)

    number of neutrons

  3. Neon shows zero electron affinity due to _____.

    (a)

    stable arrangement of neutrons

    (b)

    stable configuration of electrons

    (c)

    reduced size

    (d)

    increased density

  4. The acid which makes iron passive is _______________

    (a)

    Conc.HCl

    (b)

    Cone.H2SO4

    (c)

    Cone.HNO3

    (d)

    Cone.HF

  5. The green layer found on the copper vessel is due to the formation of ________

    (a)

    basic copper carbonate

    (b)

    cupric oxide

    (c)

    cuprous oxide

    (d)

    copper chloride

  6. The number of neutrons in 8O16 is ________

    (a)

    8

    (b)

    16

    (c)

    32

    (d)

    24

  7. Modern periodic law is based on __________

    (a)

    atomic mass

    (b)

    atomic number

    (c)

    number of neutrons

    (d)

    Both (a) and (b)

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

    (a)

    1

    (b)

    2

    (c)

    3

    (d)

    8

  9. The number of elements present in sixth period of modern periodic table is __________

    (a)

    8

    (b)

    18

    (c)

    16

    (d)

    32

  10. Pottassium belongs to ________ period

    (a)

    First

    (b)

    Second

    (c)

    Third

    (d)

    Fourth

  11. 5 x 1 = 5
  12. The chief ore of Aluminium is ________.

    ()

    Bauxite

  13. The chemical name of rust is____________

    ()

    hydrated ferric oxide

  14. The symbol of an element  is Uno; Its atomic number is ____________

    ()

    108

  15. According to Mendeleev's periodic table, the physical and chemical properties of elements are periodic function of their _______________

    ()

    atomic mass

  16. Horizontal rows in periodic table are called ________

    ()

    Periods

  17. 5 x 1 = 5
  18. First

  19. (1)

    18

  20. Third

  21. (2)

    32

  22. Fourth

  23. (3)

    8

  24. Sixth

  25. (4)

    2

  26. Alkali metal

  27. (5)

    1

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