No. of questions - 40
Time - 30 min
2.
The number of electrons in a neutral atom of an element is equal to its:
4.
The atomic number of an element is 17. The number of orbitals containing electron pairs in the valency shell is:
5.
X-rays cannot penetrate through a sheet of:
6.
The de Broglie wavelength associated with a material particle is:
7.
Compared to the lightest atom the heaviest atom weighs:
10.
The possibility of finding an electron in an orbital was conceived by:
12.
The wave nature of electron is verified by
13.
The atomic number of an element is 35 and its mass is 81. The number of electrons in its outermost shell is
15.
The quantum number that is in no way related to other quantum number is:
17.
The total number of protons present in all the elements upto ′Zn′ in the periodic table is:
18.
According to Bohr’s model of hydrogen atom
19.
Two electron in an atm of an element cannot have:
20.
Which consists of particle of matter?
22.
Threshold wavelength depends upon :
23.
The energy of electromagnetic radiation depends on:
27.
When the azimuthal quantum number has the value of 2, the number of orbitals possible are
29.
The orbital with maximum number of possible orientations is:
30.
According to Dalton’s atomic theory, the smallest particle which is capable of independent existence is:
32.
Naturally occurring elements are mixtures of:
37.
The difference between ions and atoms is of:
38.
The ground state term symbol for an electronic state is governed by
39.
In the ground state of the H-atom, the electron is
40.
How many electrons can fit into the orbitals that comprise the 3rd quantum shell?
