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