9th Standard English Medium Science Subject Periodic Classification of Elements Book Back 5 Mark Questions with Solution Part - I

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  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

    (c)

    p

    (d)

    p

  5. If the electronic configuration of an element is 1s2 2s2p6 3s2 3p1, then it will occupy___________ block of the periodic table.

    (a)

    s

    (b)

    p

    (c)

    d

    (d)

    f

*****************************************

Reviews & Comments about 9th Standard English Medium Science Subject Periodic Classification of Elements Book Back 1 Mark Questions with Solution Part - I updated Book back Questions

Write your Comment