Which of the following statement(s) is (are) | vedclass

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(A, B, D) When $NaCl$ and $K_{2}Cr_{2}O_{7}$ are warmed with conc. $H_{2}SO_{4}$, they produce deep red vapours of chromyl chloride $(CrO_{2}Cl_{2})$.

Vedclass · Accepted Answer

Chromyl chloride is formed

Vedclass · Answer

(A, B, D) When $NaCl$ and $K_{2}Cr_{2}O_{7}$ are warmed with conc. $H_{2}SO_{4}$, they produce deep red vapours of chromyl chloride $(CrO_{2}Cl_{2})$. Thus, statement $(A)$ and $(D)$ are correct.When these vapours are passed through $NaOH$ solution, they form sodium chromate $(Na_{2}CrO_{4})$, which is yellow in color. Thus, statement $(B)$ is correct.Chlorine gas is not evolved in this reaction. Thus, statement $(C)$ is incorrect.The reactions are as follows:$(I)$ $K_{2}Cr_{2}O_{7} + 6 H_{2}SO_{4} \longrightarrow 2 KHSO_{4} + 2 CrO_{3} + 3 H_{2}O$$(II)$ $NaCl + H_{2}SO_{4} \longrightarrow NaHSO_{4} + HCl$$(III)$ $CrO_{3} + 2 HCl \longrightarrow CrO_{2}Cl_{2} + H_{2}O$$(IV)$ $CrO_{2}Cl_{2} + 4 NaOH \longrightarrow Na_{2}CrO_{4} + 2 NaCl + 2 H_{2}O$

Which of the following statement$(s)$ is (are) correct when a mixture of $NaCl$ and $K_{2}Cr_{2}O_{7}$ is gently warmed with conc. $H_{2}SO_{4}?$

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