D and F blocks

The photographic industry lies on the special light sensitive properties of ?

AgBr

TiO is used for

In pigment industry

The photographic industry lies on the special light sensitive properties of ?

AgBr

TiO is used for

In pigment industry

MNO 2 is used for

dry battery cells

The D group metals that are required in battery industry are

Zinc Nickel Cadmium

Name are the coinage metals

Ag, Au, Cu

Which d group metal oxide catalyses the oxidation of SO2 in manufacture of sulfuric acid ?

V2O5

The UK coins are the alloy of

Cu/Ni

What is the basis of Ziegler catalyst and why it is used for?

TiCl4 and Al(CH3)3

Explain Waker process

In Wakers process the oxidation of ethyne to ethanol is catalysed by pdcl 2

Which complexes are useful in the polymerization of alkynes and organic compounds such as benzene

Nickel

apinoid metals are silvery in appearance

The structural variability in actinoids is obtained due to

Irregularities in metallic radius which is a far greater than lactinoids

Why the ionisation energy of early actinoids is less than the ionisation energy of early lanthanoids

This is due to the reason that when 5F orbitals are beginning to be occupied they will penetrate less into the inner core of electrons the 5 f electrons will therefore be effectively shielded from the nuclear charge then the 4F electrons to the corresponding lanthanoids

The behaviour of acronyms gets similar to lanthanoids after

After the second half of the actinoid series

Why is the lentenoid contraction is more important than the ectenoid contraction

Because the chemistry of elements succeeding the actenoids are much less known at the present time

The action of boiling water on actinides gives what

Mixture of oxides and hydrides

What is the general oxidation state of actinoids

3

Which elements in F block shows the highest oxidation state

neptunium and plutonium

What is the oxidation state of thorium

4

what is the oxidation state of actinium

3

What is the oxidation state of americium

3,4,5,6

What is the oxidation state of curium and and berkelium

3,4

Name the elements which shows +3 oxidation state only in f block

Actinium, Californium, Einstenium, Fermium, Mendelevium, Nobelium, Laurentium

On which element onwards the 5f electrons starts to fill

From Protactinium onward the 5f orbitals starts to fill and it ends on 103 element

What is the half life of Laurencium

3 minutes

what are the compounds that are predominant species in lanthanoids

La(II) and Ln(III)

What type of configuration does Ce(IV) have

noble gas configuration

What is the E- value for Ce+4/ Ce+3 and what does it suggest

1.74 and it suggest that it can oxidise water

Semarium has a very similar behaviour like ?And what oxidation states does both the elements exhibit

Europium and they show +2 and +3 O.S