MCQs of Chapter # 03 [Atomic Structure] Class IX

 

Chemistry IX

MCQs [Chapter# 03]

i.                    According to Dalton’s atomic theory, all atoms in a single element have:

a.       Same size

b.      Same mass

c.       Same chemical properties

d.     All of the above

 

ii.                 Atom can neither created nor destroyed during:

a.       Addition reaction

b.      Decomposition reaction

c.       Catenation reaction

d.     Any chemical reaction

 

iii.               The fundamental negative charged sub particle was discovered by:

a.      Moseley

b.      Chadwick

c.      J.J. Thomson

d.      Goldstein

 

iv.                Cathode rays from:

a.       Anode to cathode

b.     Cathode to anode

c.       No movement

d.      Free movement

 

v.                  Charge/ mass ratio of cathode rays is same as of:

a.      Electron

b.      Proton

c.       Neutron

d.      Alpha particles

 

vi.                The mass of proton is heavier than electron:

a.       1750

b.      1836

c.       1906

d.      2000

 

vii.             Neutron was discovered by:

a.       Moseley

b.     Chadwick

c.       J.J. Thomson

d.      Goldstein

 

viii.           Proton has charge:

a.       Negative

b.     Positive

c.       Neutral

d.      Sometime positive and sometime negative

 

ix.                Proton was discovered by:

a.      Rutherford

b.      Chadwick

c.       J.J. Thomson

d.      Goldstein

 

x.                  Which of the following cannot pass from matter?

a.      Alpha rays

b.      Beta rays

c.       Gamma rays

d.      All of the above

 

xi.                Which of the following has highest ionization power?

a.      Alpha rays

b.      Beta rays

c.       Gamma rays

d.      All of the above

 

xii.             Which of the following has highest penetration power?

a.       Alpha rays

b.      Beta rays

c.      Gamma rays

d.      All of the above

 

xiii.           Which of the following has speed equal to the speed of light?

a.       Alpha rays

b.      Beta rays

c.      Gamma rays

d.      All of the above

 

xiv.            Electron release energy when it jumps from:

a.       Higher energy level to lower energy level

b.      Lower energy level to higher energy level

c.      Both of these

d.      Electron never release energy

 

xv.              Same atomic number but different mass number is:

a.      Isotopes

b.      Isotones

c.       Isobars

d.      All of the above

 

xvi.            Hydrogen has isotopes:

a.       2

b.     3

c.       4

d.      5

 

xvii.         Oxygen has isotopes:

a.       2

b.     3

c.       4

d.      5

 

xviii.       Deuterium is used in:

a.      Heavy water

b.      Ordinary water

c.       Crackers

d.      Radioactivity

 

xix.             Maximum electrons that can reside in L shell are:

a.       2

b.     8

c.       18

d.      32

 

xx.              Minimum electrons that can reside in p-orbital is/are:

a.      1

b.      2

c.       3

d.      6