Science
A reddish-brown metal 'X', when heated in air, gives a black compound 'Y', which when heated in presence of H2 gas gives 'X' back. 'X' is refined by the process of electrolysis; this refined form of 'X' is used in electrical wiring.
Identify 'X' and 'Y'. Draw a well-labeled diagram to represent the process of refining 'X'.
Related Questions
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
MnO2 (s) + Al(s) ⟶ Mn(l) + Al2O3(s) + Heat
(a) Give reason why the above reaction is known as a thermite reaction.
(b) Identify the substance oxidised and reduced in the above reaction.
(c) Give a reason why Aluminium is preferably used in thermite reactions.
An element 'M' with electronic configuration 2 8 3 combines separately with Cl-, SO4-2 anions. Write the chemical formulae of the compounds formed. Predict with the suitable reason the nature of the bond formed by element 'M' in general. How will the electrical conductivity of the compounds formed vary with respect to 'M'?
We are advised to take iodised salt in our diet by doctors. Justify it's importance in our body.
What is the probability of a girl or a boy being born in a family? Justify your answer.