Oxygen Family

Question 1

What are the elements in the oxygen family?

Answer 1

O, S, Se, Te, Po

Also known as chalcogens

Question 2

What is the most abundant element in the oxygen family?

Answer 2

Oxygen

Comprises 21% by volume of the atmosphere, primarily produced by photosynthesis

Question 3

What is the general electronic configuration of elements in the oxygen family?

Answer 3

ns² np⁴

Question 4

What is the trend in electronegativity in the oxygen family?

Answer 4

O > S > Se > Te > Po

Question 5

What is the trend in metallic character in the oxygen family?

Answer 5

O < S < Se < Te < Po

Question 6

What is the trend in ionization energy in the oxygen family?

Answer 6

O > S > Se > Te > Po

Question 7

What is the trend in electron gain enthalpy in the oxygen family?

Answer 7

S > Se > Te > Po > O
Reason: O is small therefore electron repulsion

Question 8

Trend of ionic radii and atomic radii change in the oxygen family?

Answer 8

O < S < Se < Te < Po

Question 9

Which element has a higher catenation property, oxygen or sulfur?

Answer 9

Sulfur
Reason: O has interelectronic repulsion

Question 10

What type of compounds does oxygen mainly form?

Answer 10

Peroxides

Question 11

What type of compounds does sulfur mainly form?

Answer 11

S8 rather than S2

Question 12

Galena?

Answer 12

PbS

Question 13

What is the decay product of uranium and thorium minerals?

Answer 13

Polonium (Po)

Question 14

What is the chemical formula for gypsum?

Answer 14

CaSO4 · 2H2O

Question 15

epsum?

Answer 15

MgSO4 · 7H2O

Question 16

bauxite?

Answer 16

Al2O3

Question 17

hematite?

Answer 17

Fe2O3

Question 18

pyrolusite?

Answer 18

MnO2

Question 19

True or False: As you move down the group in the oxygen family, the catenation property increases.

Answer 19

False

Catention decreases top to bottom

Question 20

Zinc blende?

Answer 20

ZnS

Question 21

Fool’s gold

Answer 21

FeS2

Question 22

Chalcopyrite

Answer 22

CuFeS2

Question 23

Who best forms multiple bonds

Answer 23

Oxygen
Reason: 2p π 2p π overlap

Question 24

Trend of melting point and boiling point

Answer 24

O«< S< Se< Te< Po
Large diff in O and S bcz of their atomicity. O forms O2 and S forms S8

Surface area more = more mp bp

Question 25

Oxygen allotropes

Answer 25

O2 and O3 Stability O2 > O3

Question 26

Allotropes of sulphur

Answer 26

- rhombic α - monoclinic β - plastic - colloidal - chair form

Question 27

α and β sulphur coexist in

Answer 27

Dynamic equilibrium Below 95 C α Above 95 C β

Question 28

Yellow coloured sulphur allotrope, insoluble in h2o but soluble in CS2

Answer 28

RHOMBIC

Question 29

colourless sulphur allotrope, needle shaped crystals and insoluble in CS2

Answer 29

MONOCLINIC

Question 30

Chair form exists as

Answer 30

S6

Question 31

Allotrope formed when red hot sulphur is suddenly placed in cold water

Answer 31

PLASTIC

Question 32

Colloidal sulphur

Answer 32

SO2 + 2H2S —> 3S + 2H20

Question 33

At very high temp sulphur exists as

Answer 33

S2 (vapour state)

Question 34

When does sulphur show paramagnetic nature

Answer 34

S2 (vapour state)

Question 35

Why is H2O liquid but H2S gas

Answer 35

O is more EN than S Hbonding occurs in h20 and not h2s

Question 36

In the group -2 Oxid state is preferred by

Answer 36

Oxygen

Question 37

+6 oxidn state is preferred by

Answer 37

Middlemost elements

Question 38

+4 oxidn state is preferred by

Answer 38

Lowermost elements

Question 39

Covalent charecter

Answer 39

More in bigger grp 16 elements

Question 40

Thermal stability is more when

Answer 40

Ionic charecter is more