CBES Board Class 9/STRUCTURE OF ATOMS MCQS CLASS 9 Sample Test,Sample questions

Question:
 If n = 3 we are in



1. K shell

2. L shell

3. M shell

4. F shell


Question:
 In Rutherfords experiment  ? particles were deflected because of




1.electrostatic repulsion between ? particles and positively charged part of atom

2. electrostatic repulsion between ? particles and positively charged part of atom

3. electrostatic repulsion between ? particles and positively charged part of atom

4. electrostatic attraction between ? particles and positively charged part of atom


Question:
 Protium has

1. one neutron

2. two neutrons

3. no neutron

4. 3 neutrons


Question:
 The electronic configuration is the arrangement of electrons in


1.nucleus

2.shells

3. sub-shells

4. all of above


Question:
 When Uranium-238 emits ? particles it decays in to



1. Helium

2. Carbon

3. Thorium-234

4. Uranium-235


Question:
? particles are





1. positively charged

2.doubly positively charged

3.negatively charged

4.doubly negatively charged


Question:
According to Rutherford  most of the space occupied by the atom is



1. filled

2. partially filled

3. empty

4. none of above


Question:
After 3s the sub-shell begin to fill is





1.3p

2.3d

3. 3f

4. 4s


Question:
Atoms having same atomic number but different atomic mass are called





1.derivatives

2. isotopes

3.elements

4.isomers


Question:
Chlorine-35 exists in nature about



1. 0.35

2. 0.4

3. 0.5

4. 0.75


Question:
D sub-shell can accommodate maximum

1. 2 electrons

2.10 electrons

3. 14 electrons

4. 6 electrons


Question:
Electron revolves around the nucleus in orbits which have







1.variable energy

2.fixed energy

3.infinite energy

4.zero energy


Question:
Electrons revolve only in those orbits with angular momentum as an





1. half integral multiple of h

2.integral multiple of h

3. integral multiple of h ? 2?

4. half integral multiple of 2?


Question:
Iodine-123 is used to



1.diagnose thyroid problem

2.image the brain

3.kill cancer cells

4.trace the blood flow


Question:
Rutherford bombarded thin gold foil with




1.? particles

2.? particles

3.? particles

4.neutrons


Question:
The energy of an electron in orbit is proportional to




1.distance between shells

2.distance from nucleus

3.distance between two nuclei

4.positive charge inside nucleus


Question:
The energy of emitted light is equal to




1.sum of energy levels

2.difference between energies of orbits

3.product of energies of orbits

4.none of above


Question:
The lowest energy orbital among the following is




1.3h

2.2p

3.3s

4.3p


Question:
Water that contains H-2 atoms is called




1.heavy water

2.light water

3.pure water

4.chlorinated water


Question:
When an electron jumps from lower orbit to higher orbit

1. light is emitted

2. electrons are emitted

3. electrons are absorbed

4. light is absorbed


More MCQS

  1. CLASS 9 FUNDAMENTALS OF CHEMISTRY MCQS
  2. FUNDAMENTALS OF CHEMISTRY MCQS class 9 SET 2
  3. Electrochemistry Multiple Choice Questions Class 9
  4. PHYSICAL STATES OF MATTER MCQS CLASS 9
  5. Solutions Multiple Choice Questions CLASS 9
  6. STRUCTURE OF ATOMS MCQS CLASS 9
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