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