If the energy value is E = 3.03 × 10^–19 Joules, (h = 6.6×10^–34 J x sec., C = 3×10⁸ m/sec), then the value of the corresponding wavelength is:

1.	65.3 nm	2.	6.53 nm
3.	3.4 nm	4.	653 nm

Which of the following ion is not paramagnetic:
1. $C{u}^{++}$

2. $F{e}^{2+}$

3. $C{l}^{-}$

4. None of the above 

The radius of a hydrogen shell is 0.53Å. In its first excited state, radius of the shell will be:
1. 2.12 Å
2. 1.06 Å
3. 8.5 Å
4. 4.24 Å

Uncertainty in position of a $e^{-}$ and He is similar. If uncertainty in momentum of $e^{-}$ is $\mathrm{32<mspace\; width="1em"></mspace>}\times {10}^5$, then uncertainty in momentum of He will be:

In the Hydrogen atom, the energy of the first excited state is – 3.4 eV. Then find out K.E(kinetic energy) of the same orbit of the Hydrogen atom:

1. + 3.4 eV

2. + 6.8 eV

3. – 13.6 eV

4. + 13.6 eV

The value of Planck's constant is 6.63 × 10^–34 J s. The velocity of light is 3.0 × 10⁸ m s^–1. The closest value to the wavelength in nanometers of a quantum of light with a frequency of $8\times {10}^{15}$ ${\mathrm{s}}^{-1}$ is:

1. $2\times {10}^{-25}$

2. $5\times {10}^{-18}$

3. $4\times {10}^1$

4. $3\times {10}^7$

If the speed of light is 3.0 × 10⁸ m s⁻¹, how far does light travel in 2.00 nanoseconds?

1. 0.500 m

2. 0.600 m

3. 0.700 m

4. 0.800 m

Calculate the total mass and electric charge, respectively, of one mole of electrons.
1. 5.48 × ${10}^{-7}$ kg, 9.65 C
2. 5.48 × ${10}^{-7}$ C, 1.098 × 10²⁷
3. 5.48 × ${10}^{-7}$ kg, 9.65 × ${10}^4$ C
4. 9.65 × ${10}^4$ C, 1.098 × 10²⁷

Which value is indicated by the period number in the modern periodic table?

1. Atomic number

2. Atomic mass

3. Principal quantum number

4. Azimuthal quantum number.

The number of orbitals indicated by the following set of quantum numbers, n = 3, l = 2, m =+2 is:

1.  1

2.  2

3.  3

4.  4