No. of questions - 40
Time - 30 min
1.
The atomic number of an element is 17. The number of orbitals containing electron pairs in the valency shell is:
2.
Threshold wavelength depends upon :
3.
When the azimuthal quantum number has the value of 2, the number of orbitals possible are
4.
The total number of protons present in all the elements upto ′Zn′ in the periodic table is:
7.
How many electrons can fit into the orbitals that comprise the 3rd quantum shell?
9.
Two electron in an atm of an element cannot have:
11.
In the ground state of the H-atom, the electron is
12.
The de Broglie wavelength associated with a material particle is:
13.
The possibility of finding an electron in an orbital was conceived by:
14.
The ground state term symbol for an electronic state is governed by
15.
The number of electrons in a neutral atom of an element is equal to its:
17.
Which consists of particle of matter?
18.
According to Dalton’s atomic theory, the smallest particle which is capable of independent existence is:
21.
According to Bohr’s model of hydrogen atom
22.
The energy of electromagnetic radiation depends on:
25.
The orbital with maximum number of possible orientations is:
26.
The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
27.
The wave nature of electron is verified by
28.
The difference between ions and atoms is of:
29.
The quantum number that is in no way related to other quantum number is:
34.
X-rays cannot penetrate through a sheet of:
38.
Compared to the lightest atom the heaviest atom weighs:
39.
Naturally occurring elements are mixtures of:
