191.

Which of the following material is known as lunar caustic?

• AgCl

• AgNO₃

• NaOH

• NaNO₃

The lanthanide ion that would show colour is :

• Lu³⁺

• Sm³⁺

• La³⁺

• Gd³⁺

The maximum number of possible oxidation states of actinoides are shown by-

• Neptunium (Np) and plutonium (Pu)

• Nobelium (No) and lawrencium (Lr)

• Berkelium (Bk) and californium (Cf)

• Actinium (Ac) and throrium (Th)

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are :

• 8 and 8

• 6 and 8

• 8 and 6

• 6 and 6

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