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(a). A powdered substance (A) on treatme...

(a). A powdered substance (A) on treatment with fusion mixture gives a green coloured compound (B).
(b). The solution of (B) The solution of (B) in boiling water on acidification with dilute `H_2SO_4` gives a pink coloured compound (C).

Text Solution

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is `MnSO_4`
(a). `MnSO_4+Na_2CO_3+2KNO_3tounderset((B)green coloured)(Na_2MnO_4)+2KNO_2`
(b). `3Na_2MnO_4+2H_2SO_4tounderset((C) pink coloured)(2NaMnO_4)+MnO_2+2Na_2SO_4+2H_2O`
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(i) A powdered substance (A) on treatment with fusion mixture gives a green coloured compound (B). (ii) The solution of (B) in boiling water on acidification with dilute H_(2)SO_(4) gives a pink coloured compound (C ) . The oxidation state of central metal ions of (A), (B) and (C ) compounds are respectively :

(i) A powdered substance (A) on treatment with fusion mixture gives a green coloured compound (B). (ii) The solution of (B) in boiling water on acidification with dilute H_(2)SO_(4) gives a pink coloured compound (C ) . (iii) The aqueous solution of (A) on treatment with NaOH and Br_(2)- water gives a compound (D). (iv) A solution of (D) in conc. HNO_(3) on treatment with lead peroxide at boiling temperature produced a compound (E) which was of the same colour at that of (C) . Identify A , B ,C ,D , E

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(i)A powdered substance (A) on treatment with fusion mixture (Na_2CO_3+KNO_3) gives a green coloured compound (B). (ii)The solution of (B) in boiling water on acidification with dilute H_2SO_4 gives a pink coloured compound ( C). (iii)The aqueous solution of (A) on treatment with excess of NaOH and Bromine water gives a compound (D) (iv)A solution of (D) in conc. HNO_3 on treatment with PbO_2 at boiling temperature produced a compound (E) which was of the same colour at that of (C ). Sum of oxidation number of central atom of A,B,C,D & E is:

(a). An ore (A) on roasting with sodium carbonate and lime in the presence of air gives two compounds (B) and (C). (b). The solution of (B) in conc. HCl on treatment with potassiu ferroyanide gives a blue colour or precipitate of compound (D).

Identify A to E. Pyrolusite on heating with KOH in the presence of air gives a dark green compound (A). The solution of (A) on treatment with H_2SO_4 gives a purple coloured compound (B) , which gives the following reactions: (a). KI on reaction with alkaline solution of (B) changes into a compound (C). (b). The colour of the compoud (B) disappears on treatment with the acidic solution of FeSO_4 . (c). With conc. H_2SO_4 compound (B) gives (D) which can compose to yield (E) and oxygen.

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An orange coloured solution acidified with H_2SO_4 and treated with a substance 'X' gives a blue coloured solution of CrO_5 . The substance 'X' is

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