Know some inorganic!(1)

Chemistry Level 5

How many statements are correct?

Actinoids have only one stable oxidation state

Its very easy to study the chemistry of actinoids owing to there radioactive nature

Samarium has the lowest melting point among lanthanoids

Gadolinium has 7 electrons in the 4f subshell and 2 electrons in 5d subshell

Size of Zirconium(Zr) is very slightly less than that of Hafnium(Hf) owing to lanthanoid contraction

Cerium(IV) reacts explosively with water

Europium can show +2 oxidation state

4 2 7 0 5 6 1 3

1 solution

Prakhar Bindal
Nov 21, 2016

Only last statement is correct

How do you know that?

Pi Han Goh - 4 years, 6 months ago

the problem belongs to the domain of inorganic chemistry which is mostly information based . these are facts to be remembered

Prakhar Bindal - 4 years, 6 months ago

Neodymium has +2 oxidation state in its oxide.

This can be correct as well. See here . I think what you meant to say is "The only oxidation state for the oxide, Neodymium is +2".

Pi Han Goh - 4 years, 6 months ago

@Pi Han Goh – Where can you tell me the source?

Prakhar Bindal - 4 years, 6 months ago

@Pi Han Goh – According to my book Neodymium generally shows +3 state and can show +4 state in NdO2

Prakhar Bindal - 4 years, 6 months ago

@Prakhar Bindal – Are you saying that wikipedia is wrong?

Pi Han Goh - 4 years, 6 months ago

@Pi Han Goh – Where in wikipedia its written? i cant find it

Prakhar Bindal - 4 years, 6 months ago

@Prakhar Bindal –

Pi Han Goh - 4 years, 6 months ago

@Pi Han Goh – I Dont think that they they are talking of +2 state there. they are talking of +3 state ie Nd2O3

Prakhar Bindal - 4 years, 6 months ago

@Prakhar Bindal – Ohk still i will remove that statement if any confusion is there

Prakhar Bindal - 4 years, 6 months ago

@Prakhar Bindal – I don't understand what you meant. Do you mean "+2" is wrongly written (in the picture)?

Pi Han Goh - 4 years, 6 months ago

@Pi Han Goh – Nope of course not

Prakhar Bindal - 4 years, 6 months ago

@Pi Han Goh – I'm not able to edit this problem can you tell why?

Prakhar Bindal - 4 years, 6 months ago

@Prakhar Bindal – click the "dot dot dot" button below the "hide solution" button, then click "edit problem".

Pi Han Goh - 4 years, 6 months ago

@Pi Han Goh – Done and thanks! :)

Prakhar Bindal - 4 years, 6 months ago

that is some really crazy chemistry

Rohith M.Athreya - 4 years, 6 months ago