Group 16 elements

SO2

________ is an anti- chlor and also used in refining of petroleum and sugar.

Sulphur dioxide

________ is a colorless gas with pungent smell and is highly soluble in water.

SF4

Among tetrafluorides ________ is a gas, SeF4 is a liquid and TeF4 is a solid.

O3

________ is a gas, SO2 is a gas, SeO2 is a solid.

CaSO4 2H2O

Combined Sulphur exists primarily as sulphates such as gypsum ________, Epsom salt MgSO4 .7H2O, baryte BaSO4 and sulphides such as galena PbS, zinc blende ZnS, copper pyrites CuFeS2.

Contact Process

It is manufactured by the ________ which involves three steps.

Oxygen

________ is the most abundant of all elements on our earth.

Selenium

________ and Tellurium are found in their sulphide ores whereas Polonium is a radioactive element formed as a decay product of uranium and thorium minerals.

CS2

It is soluble in ________.

Dioxygen

________ is a colorless and odorless gas.

octahedral structure

All hexafluorides are gaseous in nature and have ________.

Monoclinic Sulphur

________ is prepared by melting rhombic Sulphur in a dish and cooling.

second highest electronegativity

And oxygen has the ________ after fluorine.

atmospheric oxygen

It is formed from ________ in the presence of sunlight.

Ozone

________ is a powerful oxidizing agent and is harmless only in small concentrations.

Non metal oxides

________ are acidic in nature but some of the higher oxides of metals are also acidic in nature.

Oxygen

________ and Sulphur are non- metals, Selenium and Tellurium are metalloids, Polonium is a metal.

dioxygen

Industrially, ________ is obtained from air by first removing carbon dioxide and water vapor and then, the remaining gases are liquefied and fractionally distilled to give dinitrogen and ________.

Ozone

________ is unstable and releases high amount of heat on converting into oxygen so high concentrations of ozone can be extremely dangerous.

Oxygen

________ exists as diatomic molecule (O2) whereas Sulphur exists as polyatomic molecule (S8)

Stability of the halides

F> Cl> Br> I

%%Ozone (O3)%%

Ozone is an allotropic form of oxygen

^^Sulphur^^

Sulphur exists in many allotropic forms

%%Sulphur Dioxide(SO2)%%

Sulphur dioxide is formed together with a little Sulphur trioxide when Sulphur is burnt in air or oxygen

%%Sulphuric Acid (H2SO4)%%

Sulphuric acid is one of the most important industrial chemicals worldwide