[" c) NaF and "NaCl],[" An aq solution of a gas "X" gives the following "],[" reactions: "],[" It decolourises an acidified "K_(2)Cr_(2)O_(7)" solution "]

Passage - VII : An aqueous solution of a gas (x) gives the following reactions (1) It decolourises an acidified K_(2)Cr_(2)O_(7) solution (2) On boiling with H_(2)O_(2) cooling it and then adding on aqueous solution of BaCl_(2) , a precipitation insoluble in dilute HCl is obtained (3) On passing H_(2)S in the solution white turbidity (y) is obtained (4) When gas 'x' is heated with concentrated HNO_(3) evolves a brown coloured gas (A) (5) When 'x' also dissolves in Na_(2)SO_(3) solution on heating a clear solution (C ) is formed. Gas 'x' is

Passage - VII : An aqueous solution of a gas (x) gives the following reactions (1) It decolourises an acidified K_(2)Cr_(2)O_(7) solution (2) On boiling with H_(2)O_(2) cooling it and then adding on aqueous solution of BaCl_(2) , a precipitation insoluble in dilute HCl is obtained (3) On passing H_(2)S in the solution white turbidity (y) is obtained (4) When gas 'x' is heated with concentrated HNO_(3) evolves a brown coloured gas (A) (5) When 'x' also dissolves in Na_(2)SO_(3) solution on heating a clear solution (C ) is formed. "C" is

Passage - VII : An aqueous solution of a gas (x) gives the following reactions (1) It decolourises an acidified K_(2)Cr_(2)O_(7) solution (2) On boiling with H_(2)O_(2) cooling it and then adding on aqueous solution of BaCl_(2) , a precipitation insoluble in dilute HCl is obtained (3) On passing H_(2)S in the solution white turbidity (y) is obtained (4) When gas 'x' is heated with concentrated HNO_(3) evolves a brown coloured gas (A) (5) When 'x' also dissolves in Na_(2)SO_(3) solution on heating a clear solution (C ) is formed. The brown coloured gas is

Passage - VII : An aqueous solution of a gas (x) gives the following reactions (1) It decolourises an acidified K_(2)Cr_(2)O_(7) solution (2) On boiling with H_(2)O_(2) cooling it and then adding on aqueous solution of BaCl_(2) , a precipitation insoluble in dilute HCl is obtained (3) On passing H_(2)S in the solution white turbidity (y) is obtained (4) When gas 'x' is heated with concentrated HNO_(3) evolves a brown coloured gas (A) (5) When 'x' also dissolves in Na_(2)SO_(3) solution on heating a clear solution (C ) is formed. y is

An aqueous solution of a gas (X) gives the following reactions : (a) It decolourises an acidified K_2 Cr_2 O_7 solution. (b) On boiling with H_2 O_2 , cooling it and then adding an aqueous solution of BaCl_2 , a precipitate insoluble in conc. HCl is obtained. (c) On passing H_2 S in the solution, white turbidity is obtained. Identify (X) and give equations for steps (a), (b) and (c) .

An aqueous solution of a gas (X) gives the following reactions : (a) It decolourises an acidified K_2 Cr_2 O_7 solution. (b) On boiling with H_2 O_2 , cooling it and then adding an aqueous solution of BaCl_2 , a precipitate insoluble in conc. HCl is obtained. (c) On passing H_2 S in the solution, white turbidity is obtained. Identify (X) and give equations for steps (a), (b) and (c) .

In the reaction with acidified K_(2)Cr_(2)O_(7) solution , SO_(2) acts as

If(X) turns acidified K_(2)Cr_(2)O_(7) solution green , then X may be