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

9th Standard

    Reg.No. :
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Science

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

    Part A

    10 x 1 = 10
  1. If Dobereiner is related with 'law of triads', then Newlands is related with
     

    (a)

    Modern periodic law

    (b)

    Hund's rule

    (c)

    Law of octaves

    (d)

    Pauli's Exclusion principle

  2. Modern periodic law states that the physical and chemical properties of elements are the periodic functions of their__________

    (a)

    atomic numbers

    (b)

    atomic masses

    (c)

    similarities

    (d)

    anomalies

  3. Elements in the modern periodic table are arranged in__________ groups and __________ periods.

    (a)

    7,18

    (b)

    18,7

    (c)

    17,8

    (d)

    8, 17

  4. The increasing order of the energy of subshells is

    (a)

    s>p>d>f

    (b)

    s<p<d<f

    (c)

    s<p<f<d

    (d)

    p<s<d<f

  5. Group 16 elements are collectively called as__________

    (a)

    chalcogen family

    (b)

    carbon family

    (c)

    halogens

    (d)

    nitrogen family

  6. The maximum number of electrons that can be accommodated in s, p ,d, and f subshells are__________

    (a)

    14, 10,6,2

    (b)

    6, 10,2, 14

    (c)

    2,6, 10, 14

    (d)

    6,2, 14, 10

  7. d-block elements are otherwise known as_______

    (a)

    transition elements

    (b)

    inner transition elements

    (c)

    halogens

    (d)

    alkali metals

  8. Which block of the periodic table contains metals, non-metals and metalloids?

    (a)

    s

    (b)

    p

    (c)

    d

    (d)

    f

  9. Assertion (A): Group 2 elements in the modern periodic table are called alkaline earth metals.
    Reason (R): The oxides of group 2 elements produce alkaline solutions when they are dissolved in water

    (a)

    A is right R is wrong

    (b)

    R explains A

    (c)

    R does not explain A

    (d)

    R is right A is wrong

  10. Assertion (A): Non-metals are electronegative.
    Reason (R) : Non-metal lose electrons to form cation

    (a)

    Both A & R are right

    (b)

    Both A & R are wrong

    (c)

    A is right R is wrong

    (d)

    A is wrong R is right

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