No. of questions - 40
Time - 30 min
1.
X-rays cannot penetrate through a sheet of:
4.
The difference between ions and atoms is of:
5.
Threshold wavelength depends upon :
6.
The wave nature of electron is verified by
8.
Naturally occurring elements are mixtures of:
11.
The de Broglie wavelength associated with a material particle is:
15.
Which consists of particle of matter?
16.
The quantum number that is in no way related to other quantum number is:
18.
When the azimuthal quantum number has the value of 2, the number of orbitals possible are
19.
The number of electrons in a neutral atom of an element is equal to its:
20.
How many electrons can fit into the orbitals that comprise the 3rd quantum shell?
22.
The orbital with maximum number of possible orientations is:
23.
The ground state term symbol for an electronic state is governed by
24.
The total number of protons present in all the elements upto ′Zn′ in the periodic table is:
26.
According to Bohr’s model of hydrogen atom
29.
The energy of electromagnetic radiation depends on:
32.
Two electron in an atm of an element cannot have:
33.
In the ground state of the H-atom, the electron is
34.
The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
36.
The possibility of finding an electron in an orbital was conceived by:
37.
The atomic number of an element is 17. The number of orbitals containing electron pairs in the valency shell is:
38.
According to Dalton’s atomic theory, the smallest particle which is capable of independent existence is:
39.
Compared to the lightest atom the heaviest atom weighs:
