Structure Of Atom - Practice Test, Class 9 Science


20 Questions MCQ Test | Structure Of Atom - Practice Test, Class 9 Science


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This mock test of Structure Of Atom - Practice Test, Class 9 Science for Class 9 helps you for every Class 9 entrance exam. This contains 20 Multiple Choice Questions for Class 9 Structure Of Atom - Practice Test, Class 9 Science (mcq) to study with solutions a complete question bank. The solved questions answers in this Structure Of Atom - Practice Test, Class 9 Science quiz give you a good mix of easy questions and tough questions. Class 9 students definitely take this Structure Of Atom - Practice Test, Class 9 Science exercise for a better result in the exam. You can find other Structure Of Atom - Practice Test, Class 9 Science extra questions, long questions & short questions for Class 9 on EduRev as well by searching above.
QUESTION: 1

The concept that atoms combine in small whole number ratio was proposed by:

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QUESTION: 2

During a chemical reaction, atomic number_________. 

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QUESTION: 3

The fixed circular paths around the nucleus are called_________.

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QUESTION: 4
The K, L and M shells of an atom are full. Its atomic number is_______. 
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QUESTION: 5
According to Dalton's atomic theory, the smallest particle which is capable of independent existence is:
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QUESTION: 6
According. to Dalton’s atomic theory, an atom can:
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QUESTION: 7
The mass of the atom is determined by________. 
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QUESTION: 8
Electron was discovered by___________.  
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QUESTION: 9
Chadwick got the Nobel Prize for the discovery of __________. 
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QUESTION: 10

The fluorescence on the walls of discharge tube is due to:

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QUESTION: 11
In Rutherford's alpha-scattering experiment, a foil of element that was used _______________. 
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QUESTION: 12
Cathode rays are deflected towards__________.  
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QUESTION: 13
The volume of the nucleus of an atom when compared to the extra nuclear part is_________. 
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QUESTION: 14
The proton is heavier than an electron by___________. 
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QUESTION: 15
Which of the air pressures is appropriate for the production of cathode rays in the discharge tube? 
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QUESTION: 16
Carbon-12 atom has_______________.
Solution: It contain 6 protons 6 electrons and 6 neutrons...so its atomic number is 6 and mass number is 12
QUESTION: 17
An element has an electronic configuration of 2, 8, 7. Its valency is ?
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QUESTION: 18
An atom has a mass number of 23 and atomic number 11. The number of protons are_________.  
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QUESTION: 19
 Mass number is equal to the_________.  
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QUESTION: 20
Almost the entire mass of an atom is concentrated in the__________. 
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