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NEET 2016

Exam: NEET
Year: 2016
Subject: Chemistry
Chapter: d and f Block Elements

NEET 2016 · Chemistry · d and f Block Elements

Which one of the following statements is correct when S O _ 2 is...

Which one of the following statements is correct when

S{O}_{2}

is passed through acidified

{K}_{2}C{r}_{2}{O}_{7}

solution?

Options

AThe solution turns blue.
BThe solution is decolourized.
C $S{O}_{2}$ is reduced.
DGreen $C{r}_{2}{\left(S{O}_{4}\right)}_{3}$ is formed.

Correct answer

D. Green $C{r}_{2}{\left(S{O}_{4}\right)}_{3}$ is formed.

Step-by-step solution

\begin{cases}{K}_{2}C{r}_{2}{O}_{7} + S{O}_{2} + {H}_{2}S{O}_{4} & \to & {K}_{2}S{O}_{4} \\ & & \end{cases}

\begin{cases}+ & C{r}_{2}{

\left(S{O}_{4}\right)}_{3} & + \\ & Green & \end{cases}

\begin{array}{ll}{H}_{2}O\end{array}

<br><br>Green

C{r}_{2}{

\left(S{O}_{4}\right)}_{3}

is formed.

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