1. Who discovered electrons?
A.Rutherford
B.Niels Bohr
C.J.J. Thomson
D.Newton
2. A proton posses what type of charge?
A.Positive
B.Negative
C.No charge
D.Either positive or negative
3. Constituents of atomic nucleus are
A.electrons and protons
B.electrons and neutrons
C.protons and neutrons
D.protons, neutrons and electrons
4. Consider the following events and arrange them in correct chronological order starting from the earliest to the last activity.
I. Discovery of pi meson
II. Discovery of Neutron
III. Discovery of Electron
IV. Discovery of Proton
Select the correct answer using the codes given below:
A.I, III, IV, II
B.III, IV, II, I
C.III, IV, I, II
D.III, II, I, IV
5. The atomic nucleus was discovered by
B.Dalton
C.Einstein
D.Thomson
6. Consider the following statements.
1. An atom is electrically neutral.
2. The negative charge on nucleus is equal to the total negative charge of all the orbiting electrons.Select the correct answer using the codes given below.
A.Both are incorrect.
B.Both are correct.
C.1 is correct, 2 is incorrect.
D.1 is incorrect, 2 is correct.
7. The positively charged part at the centre of an atom is called as
A.proton
B.neutron
C.electron
D.nucleus
8. Which of the following statement about atomic structure is correct?
A.Neutron and electron are found inside the nucleus and protons revolve around the nucleus.
B.Electron and proton are inside the nucleus and neutron revolve around the nucleus.
C.Proton and neutron are inside the nucleus and electrons revolve around the nucleus.
D.Proton, neutron and electron all are inside the nucleus.
9. Which of the following is not a sub-atomic particle?
A.Neutron
B.Proton
C.Deuteron
D.Electron
10. Which one of the following pairs constitutes particle-antiparticle pair?
A.Electron-Positron
B.Proton-Neutron
C.Photon-Electron
D.Neutron-Neutrino
11. Which one is a fundamental particle?
C.-meson
D.Quark
12. Higgs boson are also known as
A.electron
B.proton
C.neutrons
D.God particles
13. The nucleus of helium has
A.only one neutron
B.two protons
C.two protons and two neutrons
D.one proton and two neutrons
14. Which of the following elements does not contain neutrons?
A.Oxygen
B.Nitrogen
C.Hydrogen
D.Copper
15. Which of the following properties of atom could be explained correctly by Thomson model of atom?
A.Overall neutrality of atom
B.Spectra of hydrogen atom
C.Position of electrons, protons and neutrons in atom
D.Stability of atom
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