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