Chemistry MCQs

Page No. 49

Modern periodic table has been divided in ___________ blocks?


a2


b4


c8


d7


View Answer 4

Seventh period contains _________________ normal elements ?


a2


b4


c6


d8


View Answer 2

The longest period in the modern periodic table is___________________?


a6th


b7th


c2nd and 3rd both


d5th


View Answer 6th

Noble gases are named so because they are__________________?


aless reactive


bZero group elements


cHaving completely filled valence shell


dAll


View Answer All

Which element was not known when Mendeleev proposed his classification ?


aHydrogen


bSodium


cCopper


dGermanium


View Answer Germanium

The scientist who did not contribute in the construction of periodic table ?


aAl-Razi


bMoseley


cDobereiner


dDemocritus


View Answer Democritus

Among halogens the highest boiling point is of___________________?


aFluorine


bChlorine


cBromine


dIodine


View Answer Iodine

Which of the following always increases on going from top to bottom in a group ?


aMetallic character


bElectronegativity


cOxidizing power


dTendency to get reduced


View Answer Metallic character

An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________?


aGroup IA


bGroup IB


cGroup VIIA


dGroup VIII


View Answer Group IA

Which of the following cannot exist in solution_________________?


aO-2


bH+


cCl-


dNa+


View Answer O-2

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