Periodic Classification of Elements English Medium Free Online Test 1 Mark Questions 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. Elements in the modern periodic table are arranged in__________ groups and __________ periods.

    (a)

    7,18

    (b)

    18,7

    (c)

    17,8

    (d)

    8, 17

  3. If the electronic configuration of an element is 1s2 2S2 2p6 3s2 3p1, then it will occupy___________ block of the periodic table.

    (a)

    s

    (b)

    p

    (c)

    d

    (d)

    f

  4. Noble gases are placed in_____________ group in the modern periodic table.

    (a)

    13th

    (b)

    18th

    (c)

    17th

    (d)

    2nd

  5. 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

  6. d-block elements are otherwise known as_______

    (a)

    transition elements

    (b)

    inner transition elements

    (c)

    halogens

    (d)

    alkali metals

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

    (a)

    s

    (b)

    p

    (c)

    d

    (d)

    f

  8. 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

  9. Assertion (A): Noble gases are chemically inert in nature.
    Reason (R) : Noble gases have stable electronic structures

    (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

  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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