No. of questions - 40
Time - 30 min
1.
The difference between ions and atoms is of:
2.
The number of electrons in a neutral atom of an element is equal to its:
3.
According to Bohr’s model of hydrogen atom
4.
X-rays cannot penetrate through a sheet of:
5.
When the azimuthal quantum number has the value of 2, the number of orbitals possible are
6.
The de Broglie wavelength associated with a material particle is:
11.
The ground state term symbol for an electronic state is governed by
12.
Naturally occurring elements are mixtures of:
15.
How many electrons can fit into the orbitals that comprise the 3rd quantum shell?
16.
According to Dalton’s atomic theory, the smallest particle which is capable of independent existence is:
17.
The atomic number of an element is 17. The number of orbitals containing electron pairs in the valency shell is:
18.
Which consists of particle of matter?
20.
The possibility of finding an electron in an orbital was conceived by:
22.
In the ground state of the H-atom, the electron is
24.
The orbital with maximum number of possible orientations is:
29.
The energy of electromagnetic radiation depends on:
30.
The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
34.
Threshold wavelength depends upon :
35.
The quantum number that is in no way related to other quantum number is:
36.
Two electron in an atm of an element cannot have:
37.
The total number of protons present in all the elements upto ′Zn′ in the periodic table is:
38.
Compared to the lightest atom the heaviest atom weighs:
40.
The wave nature of electron is verified by
