1.
Kaons differ from pions because they contain ___
2.
Which pair has opposite spin direction?
3.
π⁰ is produced mainly in reactions involving ___
4.
Antiprotons were discovered by ___
5.
Quarks possess which unique property?
6.
Positrons were discovered by ___
7.
Which particle is highly unstable and produces γ-rays on annihilation?
8.
In Moseley’s equation, frequency is proportional to ___
9.
Which is NOT true about atomic number?
10.
A neutron is composed of ___
11.
Which fact about atomic number is correct?
12.
Which discovery involved p–p and p–n collisions?
13.
Moseley’s law helped establish which concept?
14.
Colour charge exists in ___
15.
Positrons are also called ___
16.
Kaons belong to which category of particles?
17.
Up and down quarks combine to form ___
18.
Which particle is not a lepton?
19.
v-particles were discovered by ___
20.
Neutral pions (π⁰) were discovered by which scientist?
21.
According to the text, neutrino spins ___
22.
Who proposed the existence of neutrino?
23.
Atomic number determines the ___ of an element.
24.
n → n + π⁰ indicates emission of which particle?
25.
Atomic number of an atom is equal to ___
26.
Which property is same for all isotopes of an element?
27.
Up quark has a charge of ___
28.
Which particle has fractional charge?
29.
Down quark has a charge of ___
30.
Which of the following is a meson?
31.
Periodic properties depend mainly on ___
32.
Pions belong to which interaction primarily?
33.
The charge of a proton arises due to ___
34.
Mass of a π-meson is approximately how many times the mass of an electron?
35.
Kaons include which charge states?
36.
Which describes v-particles?
37.
Mesons are made of ___
38.
Which of the following is NOT a v-particle?
39.
Moseley’s law relates X-ray frequency to ___
40.
Which constant in Moseley’s law depends on metal nature?
41.
For ions, atomic number equals ___
42.
Quark “flavour” refers to ___
43.
Neutrinos are characterized by which property?
44.
In Moseley’s equation ν = a(Z – b), the term “b” represents ___
45.
π-mesons are also known as ___
