Oxygen Family

Question 1

List of elements of G 16

Answer 1

O, S, Se, Te, Po

Question 2

G 16

Atomic radius
MP
BP
IE
EN
EGE
Metals and non metals

Answer 2

Increases down the group (AR, MP, BP)
Decreases down the group (IE, EN)
Decreases down the group but O is least due to small size. S, Se, Te, Po, O
O and S - non metals
Se and Te - metalloids
Po - metals

Question 3

G 16

Stability of +6
Stability of +4
Stability of -2
Oxide, peroxide, superoxide

Answer 3

Decreases
Increases
Decreases
O²- , O2 ²-, O2 -

Question 4

Hydrides of G 16

Thermal stability
Bond energy
Bond angle
Acidic strength
Reducing nature
Bond length
BP and MP

Answer 4

Decreases down the group (TS, BE, BA)
Increases down the group (AS, RN, BL)
Increases down the group (BP and MP directly proportional to mass) but H2O is highest because of HB
H2S<H2Se<H2Te<H2Po<H2O

Question 5

Oxides of G 16

EO2 or EO3. More acidic?
EO2 or EO3. More Oxidizing power?
Oxidizing power down the group

Answer 5

EO3
EO3
Increases

Question 6

G16 with halogen

Why does OF6 not exist?
What is the only F- that exists?
Why does SF6 not hydrolyse?
Shape of s8
BA and BL
Shape of S6
BA and BL

Answer 6

No vacant d orbital
SF6
Stable symmetrical structure
Puckered or crown shaped
107° and 204 pm
Chair form
102.2° and 205.7 pm

Question 7

Contact process

Temp
Pressure
Catalyst
Reaction

Why is low temp and high pressure favourable?

In practice, the plant is operated at what temp and pressure?

Answer 7

Low
High
V2O5
SO2+ O2 –v2o5–> 2SO3+H2SO4 –> H2S2O7 (oleum)
H2S2O47 + H2O –> 2 H2SO4

Exothermic, reversible and forward reaction- decrease in vol.

720 K and 2 bar