Q.1
Pick out the chemically most reactive elements from the given triads.Li, Na, K F, Cl, Br
  • Li and F
  • Li and Br
  • K and F
  • K and Br
Q.2
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
Q.3
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)
Q.4
Non metals are situated on the _____________ side of the periodic table.
  • left
  • right
  • centre
Q.5
Newlands relation is called
  • Musical Law
  • Law of Octaves
  • Periodic Law
  • Atomic Mass Law
Q.6
In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
  • Chlorine
  • Silicon
  • Oxygen
  • Germanium
Q.7
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
  • MO
  • M2O
  • M2O3
  • MO2
Q.8
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element
  • Scandium
  • Germanium
  • Gallium
  • Aluminium
Q.9
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
Q.10
At the time of Mendeleev, the number of elements known was
  • 62
  • 61
  • 63
  • 56
Q.11
Which of the following belong to same period?Element A B C D EAtomic No 6
  • DEA
  • BCD
  • ABC
  • ADE
Q.12
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
Q.13
An element X has mass numberand containsneutrons in its atom. To which group of the Periodic Table does it belong?
  • Group 1
  • Group 3
  • Group 2
  • Group 4
Q.14
Electronegative character ________ down the group
  • increases
  • decreases
  • no change
Q.15
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.
Q.16
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
Q.17
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
Q.18
Halogens belong to __________ group of periodic table
  • 12
  • 13
  • 17
  • 18
Q.19
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
Q.20
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
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