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