1.
Which sub-atomic particle was the last to be discovered?
2.
The correct decay of neutron is ___
3.
The charge of proton is equal in magnitude to that of electron because of ___
4.
Which of the following is wrong about proton?
5.
A neutron can be converted into proton when ___
6.
Which of the following is correct for mesons?
7.
Which experiment proved that electron has a definite mass?
8.
Which statement about neutron is wrong?
9.
The proton was discovered by ___
10.
The particle nature of electron was confirmed by which experiment?
11.
The term “proton” was coined by ___
12.
Electron leaves its orbit for max duration of ___
13.
The e/m value of proton changes with ___
14.
The H-atom has no ___
15.
The mass of proton is approximately how many times the mass of electron?
16.
Which particle is responsible for emission of beta rays?
17.
Which of the following increases the mass number of a nucleus?
18.
Photoelectric effect proves that electrons exhibit ___
19.
The e/m ratio of positive rays is maximum in ___
20.
Neutron is the best projectile because ___
21.
Mesons (π-mesons) are responsible for ___
22.
Which particle has no charge but has mass?
23.
The e/m ratio of proton is ___
24.
The reaction n → p + π⁻ indicates ___
25.
Which particle has the highest penetrating ability?
26.
Mesons exist in the region of ___
27.
The main reason for late discovery of neutron was ___
28.
Which particle does NOT take part in beta decay?
29.
The first evidence of atomic nucleus came from ___
30.
The stability of nucleus is mainly due to ___
31.
The charge on proton in esu is ___
32.
The density of neutron is approximately ___
33.
The proton behaves as a stable particle because ___
34.
The mass of proton is approximately equal to ___
35.
The mass of neutron is about ___
36.
The proton mass in amu is approximately ___
37.
The component most responsible for nuclear density is ___
38.
Which discovery is associated with scintillation effect on ZnS screen?
39.
The decay of neutron produces a neutrino to conserve ___
40.
The density of proton is approximately ___
41.
The deflection of positive rays in a discharge tube depends on ___
42.
Positive rays are also known as ___
43.
Which of the following is false?
44.
The range of nuclear force is about ___
45.
An isolated neutron undergoes disintegration because ___
