block 15

Question 1

1.

non metal in p block

Answer 1

nitrogen phosphorus

Question 2

metaloids in p block

Answer 2

arsenic, antimony

Question 3

metals in p block

Answer 3

bismuth

Question 4

nano3 is also called

Answer 4

chile saltpetre

Question 5

kno3 is also called

Answer 5

indian saltpetre

Question 6

common oxidation states

Answer 6

-3, +3, +5

tendency to exhibit -3 decreases due to increase in size and mettalic ch

Question 7

stability of which os decreases down the group

Answer 7

+5

and +3 increases due inert pair effect

Question 8

ammonia is

Answer 8

mild reducing agent

Question 9

BiH3

Answer 9

strong reducing agent

Question 10

basicity order

Answer 10

nh3>ph3>ash3>sbh3>bih3

Question 11

ammonia has

Answer 11

3 bond pair and one lone pair
presence of lone pair makes it lewis base

Question 12

Na2O and MgO are

Answer 12

basic

Question 13

SO3 NO2 N2O5 are

Answer 13

acidic

Question 14

N2O NO CO

Answer 14

neutral
N2O laughing gas

Question 15

orthoboric acid

Answer 15

H3BO3

Question 16

borax

Answer 16

Na2B4O4.10H2O

Question 17

kernite

Answer 17

Na2B4O7.4H2o

Question 18

bauxite

Answer 18

AL2O3

Question 19

cryolite

Answer 19

Na3alf6

Question 20

isotopes of boron

Answer 20

10B 19 per
11b 81 per

Question 21

half life of nihorium

Answer 21

20 sec

Question 22

phosphorus occurs in minrals of the

Answer 22

apatite fam

Question 23

fuorapatite

Answer 23

Ca9 (PO4)6 . CaF2

Question 24

metallic character increases down the group