d and f-Block Elements Questions

Magnetic moment 2.84 B.M. is given by :-(At. nos, Ni = 28, Ti = 22, Cr = 24, Co = 27)

Which of the following processes does not involve oxidation of iron ?

When copper is heated with conc. HNO3 it produces:

Which type of 'defect' has the presence of cations in the interstitial sites ?

Which one of the following ions exhibits d–d transition and paramagnetism as well ?

The geometry and magnetic behaviour of the complex [Ni(CO)4] are

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code : Column I Column II a. Co3+ i.8 B.M. b. Cr3+ ii.35 B.M. c. Fe3+ iii.3 ...

For the four successive transition elements (Cr, Mn, Fe and Co), the stability of + 2 oxidation state will be there in which of the following order ? (At. no. Cr = 24, Mn = 25, Fe = 26, Co = 27)...

Which series of reactions correctly represents chemical reactions related to iron and its compound?

Upon heating with Cu2S, the reagent(s) that give copper metal is/are

The pair(s) of reagents that yield paramagnetic species is/are

The catalytic activity of transition metals and their compounds is ascribed mainly to

In context of the lanthanoids, which of the following statements is not correct ?

The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because

The lanthanide contraction is responsible for the fact that

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

Most common oxidation states of Ce (cerium) are

Which of the following ions has the maximum magnetic moment ?

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a m...