Periodic Classification of Elements English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

10th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. The basis of modern periodic law is__________

    (a)

    atomic number

    (b)

    atomic mass

    (c)

    isotopic mass

    (d)

    number of neutrons

  2. Chemical formula of rust is ________.

    (a)

    FeO.xH2O

    (b)

    FeO4.xH2O

    (c)

    Fe2O3.xH2O

    (d)

    FeO

  3. The process of coating the surface of metal with a thin layer of zinc is called______.

    (a)

    painting

    (b)

    thinning

    (c)

    galvanization

    (d)

    electroplating

  4. ______ is an important metal to form amalgam

    (a)

    Ag

    (b)

    Hg

    (c)

    Mg

    (d)

    Al

  5. Among the halogens which one is most electro-negative?

    (a)

    Iodine

    (b)

    Chlorine

    (c)

    Bromine

    (d)

    Fluorine

  6. The number of neutrons in 8O16 is ________

    (a)

    8

    (b)

    16

    (c)

    32

    (d)

    24

  7. Pottassium belongs to ________ period

    (a)

    First

    (b)

    Second

    (c)

    Third

    (d)

    Fourth

  8. Which among the following are periodic properties.

    (a)

    Ionisation energy

    (b)

    atomic radius

    (c)

    eleetronegativity

    (d)

    all the above

  9. Arrange the following in the increasing order of the size. Cl-, Cl, Cl+

    (a)

    Cl- < Cl+ < Cl

    (b)

    Cl4 < Cl- < Cl+

    (c)

    Cl+ < Cl < Cl-

    (d)

    Cl+ < Cl < Cl-

  10. Slag is.

    (a)

    Metal + Ore

    (b)

    Ore + Gangue

    (c)

    Flux + Gangue

    (d)

    Ore + Flux

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