Structure of Atoms NDA Questions

NDA Chemistry

Structure of Atoms MCQ Questions


1.
Who discovered the electron using a cathode ray discharge tube experiment?
A.
J.J. Thomson
B.
James Chadwick
C.
Neils Bohr
D.
Ernest Rutherford
šŸ˜‘ View Answer Rough Work Error
ANSWER :
A. J.J. Thomson
2.
Cathode rays, when placed between two electrically charged plates, are deflected towards which plate?
A.
They are not deflected at all
B.
The positively charged plate
C.
The negatively charged plate
D.
Both plates equally
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. The positively charged plate
3.
What symbol is used to denote the charge on an electron?
A.
pāŗ
B.
eāŗ
C.
nā°
D.
eā»
šŸ˜‘ View Answer Rough Work Error
ANSWER :
D. eā»
4.
The cathode ray discharge tube experiments led to the discovery of which fundamental particle of an atom?
A.
Electron
B.
Proton
C.
Nucleus
D.
Neutron
šŸ˜‘ View Answer Rough Work Error
ANSWER :
A. Electron
5.
The canal rays (anode rays) which led to the discovery of the proton were first observed by which scientist?
A.
James Chadwick
B.
J.J. Thomson
C.
E. Goldstein
D.
Ernest Rutherford
šŸ˜‘ View Answer Rough Work Error
ANSWER :
C. E. Goldstein
6.
Canal rays obtained in a discharge tube consist of particles that are:
A.
Neutral in nature
B.
Negatively charged
C.
A mixture of neutrons only
D.
Positively charged
šŸ˜‘ View Answer Rough Work Error
ANSWER :
D. Positively charged