[X]+dil. textH2SO4 arrow [Y] colourless suffocating gas, [Y]+K2Cr2O7+H2SO4 arrow green colouration of solution. Then, [X] and [Y] are

Question

[X]+dil. textH2SO4 arrow [Y] colourless suffocating gas, [Y]+K2Cr2O7+H2SO4 arrow green colouration of solution. Then, [X] and [Y] are (A) SO32 -,SO2 (B) Cl-,HCl (C) S2 -,H2S (D) CO32 -,CO2

Tardigrade Admin · Accepted Answer

undersetXS O32 -+dil. textH2SO4 arrow undersetYS O2+H2O+SO42 - Green colouration on reaction with K2Cr2O7 and H2SO4 shows that Y is SO2 . <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/mathematics/50430e3033fa38133ee8bbd49f5debb7-.png" />

Q. $[X] + d i l . H_{2} S O_{4} \to [Y]$ colourless suffocating gas, $[Y] + K_{2} C r_{2} O_{7} + H_{2} S O_{4} \to$ green colouration of solution. Then, $[X]$ and $[Y]$ are

$S O_{3}^{2 -}, S O_{2}$

$C l^{-}, H Cl$

$S^{2 -}, H_{2} S$

$C O_{3}^{2 -}, C O_{2}$

$X S O_{3}^{2 -} + d i l . H_{2} S O_{4} \to Y S O_{2} + H_{2} O + S O_{4}^{2 -}$
Green colouration on reaction with $K_{2} C r_{2} O_{7}$ and $H_{2} S O_{4}$ shows that Y is $S O_{2}$ .

Q. [X]+dil.H2​SO4​→[Y] colourless suffocating gas, [Y]+K2​Cr2​O7​+H2​SO4​→ green colouration of solution. Then, [X] and [Y] are

SO32−​,SO2​

Cl−,HCl

S2−,H2​S

CO32−​,CO2​