Gas (A) and gas(B) both turn `K_(2)r_(2)O_(7)//H^(+)` green. Gas (A) alos turbs lead acetate paper black. When gas (A) is passed into gas (B) in ann a

Question

Gas (A) and gas(B) both turn `K_(2)r_(2)O_(7)//H^(+)` green. Gas (A) alos turbs lead acetate paper black. When gas (A) is passed into gas (B) in ann a

Gas (A) and gas(B) both turn `K_(2)r_(2)O_(7)//H^(+)` green. Gas (A) alos turbs lead acetate paper black. When gas (A) is passed into gas (B) in ann aqueous solution, yellowish white turbidiyt appears. Identify gas (A) and (B) and explain the reactions.

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

The information suggest that the gas (A) is `H_(2)S` while the gas (B) is `SO_(2)`. Both turn acidified `K_(2)Cr_(2)O_(7)` paper green.
`K_(2)Cr_(2)O_(7)+4H_(2)SO_(4)+underset("(Gas A)")(3H_(2)S) to K_(2)SO_(4) + underset("(green)")(Cr_(2)(SO_(4))_(3))+7H_(2)O+3(S)`
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+underset("(Gas B)")(3SO_(2)) to K_(2)SO_(4) + underset("(green)")(Cr_(2)(SO_(4))_(3))+H_(2)O`
`underset("(Gas A)")(H_(2)S)+(CH_(3)COO)_(2)Pb to underset("(Black ppt.)")(PbS)+2CH_(3)COOH`
`underset("(Gas A)")(2H_(2)S)+underset("(Gas B)")(SO_(2)) to 2H_(2)O+underset("(Yellowish turbidity )")(3S)`