501.

Which one of the following complexes is an outer orbital complex?

(Atomic number of Mn = 25; Fe = 26; Co = 27 and Ni = 28)

• [Fe(CN)₆]^4-

• [Mn(CN)₆]^4-

• [Co(NH₃)₆]³⁺

• [Ni(NH₃)₆]²⁺

Which of the following has the largest number of atoms?

• 0.5 gm atom of Cu

• 0.635 gm of Cu

• 0.25 moles of Cu atoms

• 1 gm of Cu

Which of the following will violate Pauli's exclusion principle?

• 

• 

• Both (a) and (b)

• None of the above

The ratio of the difference in energy between the first and second Bohr orbit to that between the second and third Bohr orbit is

• $\frac{1}{2}$

• $\frac{1}{27}$

• $\frac{4}{9}$

• $\frac{27}{5}$

Which pair of elements has same chemical properties?

• 13, 22

• 3, 11

• 4, 24

• 2, 4

The wave number of hydrogen atom in Lyman series is 82200 cm^-1. The electron goes from

• n₃ → n₂

• n₂ → n₁

• n₄ → n₃

• None of these

The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

• Li²⁺ (n = 2)

• Li²⁺ (n = 3)

• Be³⁺ (n = 2)

• He⁺ ( n = 2)

Which of the following set of quantum numbers represents the highest energy of an atom?

• n =3, l=2, m=1, s= +1/2

• n=4, l=0, m=0, s= -1/2

• n=3, l=0, m=4, s= +1/2

• n=3, l=1, m=1, s=+1/2

The number of radial nodes present in 3p orbital is

• 0

• 1

• 2

• 3

The radiation with maximum frequency is

• X-ray

• radio waves

• UV rays

• IR rays