D block

Question 1

No of f electrons in Lanthanoids

Answer 1

Ce       1
Pr        3
Nd       4
Pm       5
Sm       6
Eu        7
Gd       7
Tb        9
Dy        10
Ho        11
Er         12
Tm        13
Yb         14
Lu          14

Question 2

Density order

Answer 2

Sc < Ti < V

Question 3

Electrode potential depends on which 3 factors

Answer 3

Sublimation enthalpy
Ionization Enthalpy
Hydration enthalpy

Question 4

Cu2+ has +ve reduction potential due to

Answer 4

High atomization enthalpy

Question 5

Ni2+ has very negative electrode potential due to

Answer 5

Very negative hydration enthalpy

Question 6

CrO

Answer 6

basic

Question 7

VO

Answer 7

basic

Question 8

Mn2O7

Answer 8

acidic

Question 9

CrO3

Answer 9

acidic

Question 10

V2O3

Answer 10

Basic

Question 11

V2O5

Answer 11

Amphoteric(slightly acidic)

Question 12

MnO

Answer 12

basic

Question 13

Cr2O3

Answer 13

amphoteric

Question 14

CrO3

Answer 14

acidic

Question 15

MnO2

Answer 15

amphoteric

Question 16

ZnO

Answer 16

amphoteric

Question 17

FeO

Answer 17

basic

Question 18

TiO

Answer 18

Basic

Question 19

CuO

Answer 19

basic

Question 20

MnO2

Answer 20

amphoteric

Question 21

Sc2O3

Answer 21

amphoteric

Question 22

Fe2O3

Answer 22

amphoteric