CBSE
Multiple Choice QuestionsCalculate the energy in joule corresponding to light of wavelength 45mm: (Planck's constant h=6.63 x10-34)Js; speed of light c= 3 x 108 ms-1)
6.67 x 1015
6.67 x 1011
4.42 x 10-15
4.42 x 10-15
Magnetic moment 2.84 BM is given by (At. no. Ni= 28, Ti= 22, Cr=24, Co = 27)
Ni2+
Ti3+
Cr3+
Cr3+
The value of Planck's constant is 6.63 x 10-34 Js. The speed of light is 3 x1017 nms-1 . Which value is closet to the wavelength in nanometer of a quantum of light with frequency of 6 x 1015 s-1 ?
10
25
50
50
Maximum number of electrons in a subshell with l =3 and n=4 is
14
16
10
10
The angular momentum of electrons in d orbital is equal to
The correct set four quantum number for the valence electron of rubidium atom (z=37) is
5,1,1, +1/2
6,0,0,+1/2
5,0,0 +1/2
5,0,0 +1/2
Based on equation
E=-2.178 x 10-18 J 
certain conclusions are written. Which of them is not correct?
The negative sign in the equation simply means that the energy of an electron bound to the nucleus is lower than if would be if the electrons were at the infinite distance from the nucleus.
Larger the value of n, the larger is the orbit radius
Equation can be used to calculate the change in energy when the electron changes orbit
Equation can be used to calculate the change in energy when the electron changes orbit
What is the maximum number of electrons that can be associated with the following set of quantum number?
n=3, l =1 and m=-1.
10
6
4
4
What is the maximum number of orbitals that can be identified with the following quantum numbers?
n=3, l =1, m1 = 0
1
2
3
3
Two electrons occupying the same orbital are distinguished by
Magnetic quantum number
Azimuthal quantum number
Spin quantum number
Spin quantum number
