4. What happens when quieR IT5. A shiny brown element when heated in a china dish acquires a black coatingWhen hydrogen gas is passed over it, again gives a shiny color element.(a) Identify the brown colour element, the black compound and thereaction involved.(b) Write a balanced chemical equation for the above observation.(vii) I(viiiVilos what hannens if following changes

4. What happens when quieR IT5. A shiny brown element when heated in a

1.	4. What happens when quieR IT5. A shiny brown element when heated in a china dish acquires a black coatingWhen hydrogen gas is passed over it, again gives a shiny color element.(a) Identify the brown colour element, the black compound and thereaction involved.(b) Write a balanced chemical equation for the above observation.(vii) I(viiiVilos what hannens if following changes
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