P Block

Question 1

Electronic configuration

Answer 1

(ns1)(np1)

Question 2

Oxidation state

Answer 2

+3

Question 3

Anomalous behavior

Answer 3

Boron(nonmetal)

All others are metal

Question 4

Radii trend

Answer 4

Doesn’t increase on descending the group

Question 5

Unusual element

Answer 5

Gallium shows half expected radius

Question 6

Gallium indium and tellurium

Answer 6

Outer shell d10 electronic configuration

Question 7

GA in tl

Answer 7

Show poor shielding effect

Question 8

4f electron

Answer 8

TI IS LARGER THAN IN

Question 9

Ionic radii m3+ exists

Answer 9

Atomic radii b3+ doesn’t exist

Question 10

Down the group+1 oxidation state increase and more stable than +3

Answer 10

Due to inert pair effect

Question 11

Melting point

Answer 11

Regular trend

Question 12

Structure of boron

Answer 12

20 faced icosahedral

Question 13

Variation of boiling point

Answer 13

Expected

Question 14

Density

Answer 14

Increase down the group

Question 15

IE

Answer 15

Doesn’t follow regular trend

Question 16

Standard electrode potential

Answer 16

E°=(M+|M)

Question 17

Reaction with oxygen

Answer 17

All element on burning form M2O3

Ti2O3

Question 18

For aluminium∆Hf=???

Answer 18

-1670kj

Question 19

Reactions with water

Answer 19

Forms protective layer of M2O3

Question 20

Oxides

Answer 20

M2O3

Question 21

Halide

Answer 21

MCl3

Question 22

Boron and silicone

Answer 22

Forms alloys spontaneous and inflammable

Question 23

Reaction with alkalis

Answer 23

BO4. SiO4

Question 24

14th group electronic configuration

Answer 24

new np2

Question 25

Oxidation state

Answer 25

+4

Question 26

Metallic character

Answer 26

Starts from non Metal ends on metal

Question 27

Melting point

Answer 27

Decreases down the group

Question 28

Boiling point

Answer 28

Decreases down the group

Question 29

Properties of An And Pb

Answer 29

Most electronegative

Question 30

Catenation

Answer 30

Ability of atoms to link one another

Through covalent bonds

Question 31

Catenation

Answer 31

Decreases down the group

Question 32

Bonding

Answer 32

Besides pπ-pπ bonds

Carbon forms bond with itself

Question 33

Dπ-pπ

Answer 33

Compounds with Si

However can form double bonds
Through Dπ-pπ bonding in Which p orbital is expanded

Question 34

Expansion of p orbital is called

Answer 34

Back bonding

Question 35

Maximum covalence

Answer 35

Carbon