D and F block elements

Question 1

3d series is from

Answer 1

SC to zn

Question 2

4 d series is from

Answer 2

Y to Cd

Question 3

5 d series is from

Answer 3

La and Hf to Hg

Question 4

6 d series is from

Answer 4

Ac and elements from Rf to Cn

Question 5

The element which does not have electrons in s orbital during ground state

Answer 5

Pd

Question 6

Which orbital protrude to the periphery very much and hence are more influenced by surroundings

Answer 6

D orbital

Question 7

Ions of d^ n configuration show similarity in

Answer 7

Magnetic and electronic properties

Question 8

In any row of d block elements the melting points of these metals rise to a maximum at d^5 but the exceptions are

Answer 8

Mn and Tc

Question 9

A very important factor that determines the standard electrode potential is

Answer 9

Enthalpy of atomization

Question 10

High enthalpy of atomization means

Answer 10

High boiling point

Question 11

Metals with high enthalpy of atomization tends to be

Answer 11

Noble in their reaction

Question 12

Which series of d block have more enthalpy of atomization

Answer 12

2d and 3d ( graph in ncert)

Question 13

The factors affecting ionization enthalpy is

Answer 13

Attraction btw nucleus and electron
Repulsion btw Electrons
Exchange energy

Question 14

In p block which oxidation state is favoured by heavier members

Answer 14

Lower oxidation state ( inert pair effect)

Question 15

In d blocks which oxidation state is found to be stable for heavier members

Answer 15

High oxidation state

Question 16

Copper is inable to liberate H2 from acids because of

Answer 16

Positive electrode potential

Question 17

Which acids react with Cu

Answer 17

Nitric acid and hot concentrated sulphuric acid

Question 18

For which all elements electrode potential is more negative than expected

Answer 18

Mn, Ni and Zn

Question 19

Beyond Mn which all have trihalides

Answer 19

Fe and Co

Question 20

Why is Cu(2+) more stable than Cu(1+) in aqueous solution ?

Answer 20

Because of more negative hydration enthalpy

Question 21

The metals of first series are reactive the exception to this is

Answer 21

Cu

Question 21

Ti(2+) , V(2+) and Cr(2+) are

Answer 21

Strong reducing agents

Question 21

Mn(3+) , Co(3+) are

Answer 21

Strong oxidizing agents

Question 22

The catalyst btw iodine and persulphate ions

Answer 22

Fe (3+)

Question 23

The melting point of interstitial compound is

Answer 23

Higher than pure metals

Question 24

As oxidation number of metal increase the

Answer 24

Ionic charecter decreases

Question 25

Mn2O7 is a

Answer 25

Covalent green oil

Question 26

CrO is

Answer 26

Basic

Question 27

Cr2O3 is

Answer 27

Amphoteric

Question 28

The Cr-O-Cr bond in dichromate is

Answer 28

126°

Question 29

The terminal Cr -O bond is

Answer 29

163pm

Question 30

The colour of pottasium permanganate is

Answer 30

Dark purple

Question 31

Pottasoum permanganate is isostructural with

Answer 31

KClO4

Question 32

Fe(3+)

Answer 32

Yellow

Question 32

Fe (2+) is

Answer 32

Green

Question 33

Strong oxidizing agent of lanthanoids is

Answer 33

Ce(4+) , Tb (4+)

Question 34

Strong reducing agent of lanthanoids are

Answer 34

Sm(2+) , Eu(2+)

Question 35

F electrons are not present in which actinoids

Answer 35

Thorium

Question 36

Which I sused in pigmentation industry

Answer 36

TiO