The energy of light of wavelength 45 nm is _____________.

(a)

6.67 x 10¹⁵J

(b)

6.67 x 10¹¹J

(c)

4.42 x 10^-18J

(d)

4.42 x 10^-15J

The energies E₁and E₂ of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie \(\lambda \)₁ and\(\lambda \)₂ will be ___________

(a)

\(\frac { { \lambda }_{ 1 } }{ { \lambda }_{ 2 } } =1\)

(b)

\({ \lambda }_{ 1 }=2{ \lambda }_{ 2 }\)

(c)

\({ \lambda }_{ 1 }=\sqrt { 25\times 50{ \lambda }_{ 2 } } \)

(d)

\(2{ \lambda }_{ 1 }={ \lambda }_{ 2 }\)

Splitting of spectral lines in an electric field is called _____________

(a)

Zeeman effect

(b)

Shielding effect

(c)

Compton effect

(d)

Stark effect

The electronic configuration of Eu (Atomic no. 63) Gd (Atomic no. 64) and Tb (Atomic no. 65) are ____________

(a)

[Xe] 4f⁶ 5d¹ 6s², [Xe] 4f⁷ Sd¹ 6s² and [Xe] 4f⁸  5d¹ 6s²

(b)

[Xe] 4f⁷ , 6s², [Xe] 4f⁷ 5d¹ 6s² and [Xe] 4f⁹ 6s²

(c)

[Xe] 4f⁷ ,6s², [Xe] 4f⁸ 6s² and [Xe] 4f⁸ 5d¹ 6s²

(d)

[Xe] 4f⁶ 5d¹ 6s², [Xe] 4f⁷ 5d¹ 6s² and [Xe] 4f⁹ 6s²

The number of nodes in s orbital of any energy level is equal to _________

(a)

n

(b)

2n²

(c)

n-1

(d)

n-2

How many nodes are possible for 2s orbital?

(a)

1

(b)

2

(c)

3

(d)

zero

As per Aufbau principle, arrange the orbitals in increasing order of energy __________

(a)

4p > 4d > 5s > 5p

(b)

4p < 4d < 5s < 5p

(c)

4d < 4p < 5s < 5p

(d)

4p < 5s < 4d < 5p

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? n = 3, I = 1 and m =-1

(a)

4

(b)

6

(c)

2

(d)

= 10

The total number of orbitals associated with the principal quantum number n = 3 is _________

(a)

9

(b)

8

(c)

5

(d)

7

How many orbitals are possible for n = 4?

How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes

Which quantum number reveal information about the shape, energy, orientation and size of orbitals?

Write a note on Thomson's plum pudding model of an atom.

What did Rutherford's alpha ray scattering experiment prove

An electron a proton which one will have a higher velocity to produce matter waves of the same wavelength? Explain it

Explain why the uncertainty principle is significant only for the motion of sub-atomic particles but is negligible for the macroscopic objects?

State and explain pauli exclusion principle.

Explain briefly the time independent schrodinger wave equation?

Describe the Aufbau principle

Enlist the postulates of Bohr's atom model.

By applying Bohr's postulates, arrive at the radius of n^th orbit for hydrogen like atom

An ion with mass number 37 possesses unit negative charge. If the ion contains 11.1% more neutrons than electrons, Find the symbol of the ion.