Periodic Classification of Elements English Medium Free Online Test 1 Mark Questions 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. 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 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

  5. Pottassium belongs to ________ period

    (a)

    First

    (b)

    Second

    (c)

    Third

    (d)

    Fourth

  6. The distance from the centre of the nucleus to the outer most electron in an ion is termed as _________ radii.

    (a)

    atomic

    (b)

    ionic

    (c)

    Covalent

    (d)

    both (b) and (c)

  7. The process of extracting the ore from the earth's crust is ____________

    (a)

    Metallurgy

    (b)

    Mining

    (c)

    Smelting

    (d)

    Leaching

  8. The process of extraction of aluminium from bauxite is called ____________ process

    (a)

    Hall's

    (b)

    Baeyer's

    (c)

    Smelting

    (d)

    Calcination

  9. The chemical formula of sodium meta aluminate is ___________

    (a)

    NaAlO2

    (b)

    Na2AlO2

    (c)

    NaAl2O2

    (d)

    Na2Al2O3

  10. 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

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