Question

write the names of the following compounds. 1) iron + sulphur . 2) manganese + oxygen. aluminium + sulphur​

Answer 1

#1

• Ferrous shows variable valency as it's transitive metal.

#For valency=2

`\\ \rm\Rrightarrow {Fe(II)\atop Iron}+{S\atop Sulphur}\longrightarrow {FeS\atop Pyrrhotite}`

#For valency=3

`\\ \rm\Rrightarrow {Fe(III)\atop Iron}+{S\atop Sulphur}\longrightarrow {Fe_2O_3\atop Sesquisulfide}`

#2

• Manganese also shows variable valency

#For valency=2

`\\ \rm\Rrightarrow {Mn(II)\atop Manganese}+{O_2\atop Oxygen}\longrightarrow {MnO_2\atop Manganese (II) Oxide}`

#For valency=4

`\\ \rm\Rrightarrow {Mn(IV)\atop Manganese}+{O_2\atop Oxygen}\longrightarrow {MnO_4\atop Permanganate}`

#3

`\\ \rm\Rrightarrow {Al\atop Aluminium}+{S\atop Sulphur}\longrightarrow {Al_2S_3\atop Aluminium\:Sulphide}`

Answer 2

1. FeS
2. MnO₂
3. Al₂S₃

Step-by-step explanation:

1) Iron + Sulphur = ?

→ Iron sulfide

2) Manganese + Oxygen = ?

→ Manganese dioxide

3) Aluminium + Sulphur = ?

→ Aluminium sulfide