Which of the following statements is-are correct when a solid mixture of KCl and K 2 Cr 2 O 7 is gently warmed with conc- H 2 SO 4 -A- A deep red vapour is evolvedB- The vapour when passed into - NaOH - solution gives a yellow solutionC- Chlorine gas is evolvedD- Chromyl chloride is formed

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Byju's Answer

Standard XII

Chemistry

Potassium Permanganate

Which of the ...

Question

Which of the following statement(s) is/are correct when a solid mixture of $K C l$ and $K_{2} C r_{2} O_{7}$ is gently warmed with conc. $H_{2} S O_{4}$ ?

A deep red vapour is evolved

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The vapour when passed into `NaOH` solution gives a yellow solution

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Chlorine gas is evolved

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Chromyl chloride is formed

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Solution

The correct options are
A A deep red vapour is evolved
B The vapour when passed into `NaOH` solution gives a yellow solution
D Chromyl chloride is formed
When a solid mixture of $K C l$ and $K_{2} C r_{2} O_{7}$ is heated with conc. $H_{2} S O_{4}$ , the products obtained are:

$4 K C l + K_{2} C r_{2} O_{7} + 6 H_{2} S O_{4} \to 2 C r O_{2} C l_{2} (Red vapour) + 6 K H S O_{4} + 3 H_{2} O$

$C r O_{2} C l_{2} + 4 N a O H \to N a_{2} C r O_{4} (Yellow solution) + 2 N a C l + 2 H_{2} O$

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Which of the following statement(s) is/are correct when a mixture of $N a C l$ and $K_{2} C r_{2} O_{7}$ are gently warmed with conc. $H_{2} S O_{4}$ ?

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Which of the following statement(s) is/are correct when a solid mixture of KCl and K2Cr2O7 is gently warmed with conc. H2SO4?

Which of the following statement(s) is/are correct when a solid mixture of $K C l$ and $K_{2} C r_{2} O_{7}$ is gently warmed with conc. $H_{2} S O_{4}$ ?