Question

Iron is allowed to react with a greenish-yellow gas to form a compound ‘A’. When compound
‘A’ is made to react with sodium hydroxide solution then it forms a soluble salt ‘B’ and an insoluble salt ‘C’. [3]
i) Identify ‘A’, ‘B’ and ‘C’.
ii) Give chemical equations for both the reactions.
iii) State the colour of the insoluble salt ‘C’.

Answer 1

$\huge\fcolorbox{cyan}{pink}{ANSWER:}$

(i) Mercury (Hg)

(ii) Sodium and potassium  

(iii) Silver and copper

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