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Periodic Classification of Elements

10th Standard Science Unit 8 Periodic Classification of Elements One Mark Question and Answer

Periodic Classification of Elements One Mark Questions

10th Standard

    Reg.No. :
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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. Potassium belongs to ________ period

    (a)

    First

    (b)

    Second

    (c)

    Third

    (d)

    Fourth

    11. 5 x 1 = 5

  11. The chief ore of Aluminium is ________.

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    Bauxite

  12. The chemical name of rust is____________

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    hydrated ferric oxide

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

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    108

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

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    atomic mass

  15. Horizontal rows in periodic table are called ________

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    Periods

    16. 5 x 1 = 5

  16. First

    17. (1)

    1

  17. Third

    18. (2)

    2

  18. Fourth

    19. (3)

    32

  19. Sixth

    20. (4)

    8

  20. Alkali metal

    21. (5)

    18

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