P-orshce taycan

Question 1

What is the highest oxidation state of a p-block element?

Answer 1

sum of valence electron

Question 2

What is the difference between the elements in the first element in the p block to the second block in the p block?

Answer 2

1) due to the presence of d block they can expand their covalency
2) the later elements cannot form pi bond

Question 3

What is the formula of orthoboric acid?

Answer 3

H3BO3

Question 4

What is the formula of borax ?

Answer 4

Na2B4O7 . 10H2O

Question 5

What is the formula of kernite?

Answer 5

Na2B4O7. 4H2O

Question 6

Where do we find borax in india?

Answer 6

puga valley in ladakh

samhar lake rajasthan

Question 7

What is the most abundant element in earth? What about the second and the third most abundant element on earth?

Answer 7

1) O
2) Si
3) Al

Question 8

What is the formula of bauxite?

Answer 8

Al3O3. 2H2O

Question 9

What is the formula of cryolite?

Answer 9

Na3AlF6

Question 10

Where is mica abundant in india?

Answer 10

madhya pradesh, karnataka, orrissa and jammu

Question 11

What is the half life of nihonium?

Answer 11

20 seconds

Question 12

What is the order of atomic radius of the 13 group elemens? and why ?

Answer 12

B < Ga < Al

Question 13

What are the values of the electronegativity of group 12 ?

Answer 13

B = 2.0
Al = 1.5 
Ga  = 1.6 
In = 1.7 
Tl = 1.8

Question 14

What is the boiling point order of the 12 group element?

Answer 14

B > Al > Ga < In

Question 15

What is the reason for the unusually high boiling point and melting point of B?

Answer 15

due to strong lattice strucutre

Question 16

What is the order of stability of +1 oxidation state of the group 13 elements? what happens when we compare about + 3?

Answer 16

+1 : B Al>Ga > In > Tl

Question 17

What happens when group 13 element’s trichloride is hydrolysed?

Answer 17

[M(OH)4]-

Question 18

What happens to aluminium chloride when kept in an acidic solution?

Answer 18

[Al(H20)6]3+

Question 19

Rate the oxides of 13 group elements , acidic, basic or neutral?

Answer 19

b acidic
al, ga : amphoteric
in, tl : basic

Question 20

What happens when Al is put in a concentrated nitric acid?

Answer 20

it forms a protective oxide coat on it (I DONT KNOW WHY ASK SIR)

Question 21

What happens when Al reacts with NaOH ?

Answer 21

Al + NaOH+ h2o ==== Na+ [Al(OH)4]- + 3H2

Question 22

What is the nature of the trichlorides, bromides, iodieds of 13 grou pelements?

Answer 22

they are covalent in nature

Question 23

What is the formula of borax?

Answer 23

Na2B4O7. 10 H20
or more prescisely
Na2(B4.O5. (OH)4 ] . 8H20