The IUPAC symbol for the element with atomic number 119 would be:

• uun

• uue

• uuh

• une

Consider the hydrated ions of Ti²⁺,v²⁺, Ti³⁺ and Sc³⁺ The correct order of their spin only magnetic moments is :

• Ti³⁺ < Ti²⁺< Sc³⁺< V²⁺

• Vi²⁺ <Ti²⁺< Ti³⁺ < Sc³⁺

• Sc³⁺< Ti³⁺< Ti²⁺<V²⁺

• Sc³⁺< Ti³⁺< V²⁺< Ti²⁺

Three complex [CoCl(NH₃)₅]²⁺ (I)[Co(NH₃)₅H₂O]³⁺(II) and [Co(NH₃)₆]³⁺(III) absorb light in the visible region . the correct order of the wavelength of light absorbed by them is :

• II > I > III

• III > I > II

• I> II> III

• III> II> I

The correct order of the first ionization enthalpies is :

• Ti < Mn < Ni < Zn

• Mn < Ti < Zn < Ni

• Ti < Mn < Zn < Ni

• Zn < Ni < Mn < Ti

The highest possible oxidation states of uranium plutonium , respectively are

• 6 and 7

• 7 and 6

• 4 and 6

• 6 and 4

When copper is heated with conc. HNO3 it produces

• Cu(NO₃)₂ and NO

• Cu(NO₃)₂, NO and NO₂

• Cu(NO₃)₂ and N₂O

• Cu(NO₃)₂ and N₂O

Which one of the following statements is correct when SO₂ is passed through acidified K₂Cr₂O₇ solution?

• The solution is decolourized

• SO₂ is reduced

• Green Cr₂(SO₄)₃ is formed

• The solution turns blue

Because of lanthanoid contraction, of elements which of the following elements have nearly same atomic radii ? (Number in the parenthesis are atomic number).

• Ti (22) and Zr(40)

• Zr(40) and Nb (41)

• Zr (40) and Hf (72)

• Zr (40) and Hf (72)

569.

In acidic medium,H₂O₂ changes Cr₂O₇^2- to CrO₅ which has two (-O-O-) bonds. Oxidation state of Cr in CrO₃ is 

• +5

• +3

• +6

• +6

Reason of lanthanoid contraction is

• negligible Screening effect of 'f' orbitals

• increasing the nuclear charge

• decreasing the nuclear charge

• decreasing the nuclear charge