15th group

Question 1

Atomic size, density, metallic character

Answer 1

⬆️

Question 2

Ionic radius

Answer 2

P<As<Sb<Bi

Question 3

IE1, EN, Covalent, Hydrolysis

Answer 3

⬇️

Question 4

IE

Answer 4

N>P>As>Bi>Sb

Question 5

MP

Answer 5

As>Sb>Bi>P>
Trick: AS BP

Question 6

BP

Answer 6

Sb>As>Bi>P>N
Trick: Sreya and Bharadwaj gave puppy name

Question 7

OS

Answer 7

+3, -3, +5

Question 8

Top to bottom -3 O. S ⬇️ due to

Answer 8

⬆️ in size
⬆️ in metallic character

Question 9

Top to bottom +3⬆️, +5 O. S ⬇️ due to

Answer 9

IPE

Question 10

N exhibit which O. S when reacted with oxygen

Answer 10

1,2,4

Question 11

Which element doesn’t form compounds with halogen? Why?

Answer 11

N
Absence of d orbital

Question 12

Which element shows 1,4 O. S in oxoacids

Answer 12

P

Question 13

Which element is gas? Solids?

Answer 13

N-gas
Others-solids

Question 14

Which are non metals? Metals? Metalloids?

Answer 14

N, P- Nm
As, Sb- Metalloids and bi is metal

Question 15

Which element doesn’t exhibit allotropy?

Answer 15

N

Question 16

In reactivity towards hydrogen, which prop ⬆️ and ⬇️ down the group?

Answer 16

⬆️- Bond length, red nature
⬇️- BDae, Stability, Basic, BA

Question 17

Order of BP in hydrides and why

Answer 17

Bi>Sb>N>As>P
Intermolecular H bond

Question 18

Order of Mp in hydride

Answer 18

N>Bi>Sb>As>P
Crystal lattice enthalpy

Question 19

Which hydride exhibit sp3 hybridization?

Answer 19

NH3

Question 20

In reactivity towards oxygen, acidic strength order?

Answer 20

⬇️

Question 21

Non metals are

Answer 21

Acidic

Question 22

Metalloids are

Answer 22

Amphoteric

Question 23

What element doesn’t exist due to IPE

Answer 23

Bicl5

Question 24

N forms which type of bonds with itself?

Answer 24

Pπ-dπ

Question 25

Which elements forms dπ-pπ

Answer 25

Other elements except N

Question 26

Which bonds are weaker? N or P and why

Answer 26

N High interelectronic repulsion of non bonding electrons