Quiz  /  Periodic Classification of Elements Class 9 MCQ Questions With...

  • 1. 
    An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?

  • Group 1
  • Group 3
  • Group 2
  • Group 4

  • 2. 
    At the time of Mendeleev, the number of elements known was

  • 62
  • 61
  • 63
  • 56

  • 3. 
    According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'.

  • Atomic no of elements
  • Atomic mass of elements
  • Atomic volumes of elements
  • Atomic densities of elements

  • 4. 
    Which one of the following does not increase while moving down the group of the periodic table?

  • Atomic radius
  • Metallic character
  • Valency
  • Number of shells in an element.

  • 5. 
    Non metals are situated on the _____________ side of the periodic table.

  • left
  • right
  • centre

  • 6. 
    Choose the correct statement from the following:

  • Mendeleev considered oxides and halides made by elements as criteria for classification
  • Newland's law of octaves was valid upto the element vanadium
  • Doberieneer could identify only 5 triads
  • modern periodic table removed the anomaly of position of isotopes

  • 7. 
    EKABORON , EKA ALUMINIUM AND EKA SILICON REPRESENT WHICH OF THE FOLLOWING SETS OF ELEMENTS?

  • SCANDIUM,GALLIUM,GERMANIUM
  • GERMANIUM, SCANDIUM,GALLIUM,
  • GALLIUM,SCANDIUM ,GERMANIUM
  • GALLIUM,GERMANIUM, SCANDIUM

  • 8. 
    Which set of elements in the periodic table are called metalloids?

  • Boron, silicon, germanium, arsenic
  • Antimony, tellurium, polonium
  • Aluminium, gallium, indium
  • Both (a) and (b)

  • 9. 
    Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?

  • oxides become more acidic
  • the atom gains electrons readily
  • the element becomes more metallic
  • there is increase in no of valence electrons

  • 10. 
    Halogens belong to __________ group of periodic table

  • 12
  • 13
  • 17
  • 18

  • 11. 
    Upto which element, the Law of Octaves was found applicable?

  • CALCIUM
  • MAGNESIUM
  • ALUMINIUM
  • POTASSIUM

  • 12. 
    Which of the following belong to same period?Element A B C D EAtomic No 3 2 14 9 6

  • DEA
  • BCD
  • ABC
  • ADE

  • 13. 
    Pick out the chemically most reactive elements from the given set of elementsLi, Na, K F, Cl, Br

  • Li and F
  • Li and Br
  • Na and Cl
  • K and F

  • 14. 
    Electronegative character ________ down the group

  • increases
  • decreases
  • no change

  • 15. 
    Select the correct arrangement of following elements in doberieners triads Sr, K, Ca, Br, Na, Ba, Cl, I, Li

  • i) Li Sr K ii) Ca Na Ba iii) Cl Br I
  • i) Li Na K ii) Ca Sr I iii) Cl Br Ba
  • i) Li Na K ii) Ca Sr Ba iii) Cl Br I
  • i) Ca Na K ii) Li Sr Ba iii) Cl Br I

  • 16. 
    Which of the following set of elements are arranged in increasing order of metallic character?

  • Be Mg Si
  • Li Na K
  • Cl Br I
  • K Na Rb
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