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

A deep red vapours is evolved.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

The red vapours when passed into NaOH solution gives a yellow solution of

N a_{2} C r O_{4}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Chlorine gas is evolved.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Chromyl chloride is formed.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct options are
A A deep red vapours is evolved.
B The red vapours when passed into NaOH solution gives a yellow solution of $N a_{2} C r O_{4}$ .
D Chromyl chloride is formed.
When a mixture of $N a C l$ and $K_{2} C r_{2} O_{7}$ is gently warmed with conc. $H_{2} S O_{4}$ , the following reaction takes place:

$K_{2} C r_{2} O_{7} + 4 N a C l + 6 H_{2} S O_{4} \to 2 C r O_{2} C l_{2} + 2 K H S O_{4} + 4 N a H S O_{4} + 3 H_{2} O$

Chromyl chloride ( $C r O_{2} C l_{2}$ - deep red vapours) is formed. These vapours when passed into $N a O H$ solution give a yellow solution of $N a_{2} C r O_{4}$ .

The reaction takes place as follows:

$C r O_{2} C l_{2} + 2 N a O H \to N a_{2} C r O_{4} + 2 H C l$

Suggest Corrections

Similar questions

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. $H_{2} S O_{4}$ ?

Q. 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}

Q. 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}

is gently warmed with conc.

H_{2} S O_{4}

Q. 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}

is gently warmed with conc.

H_{2} S O_{4}

Q. When a mixture of solid

N a C l

, solid

K_{2} C r_{2} O_{7}

is heated with conc.

H_{2} S O_{4}

, orange red vapours are obtained of the compound:

Join BYJU'S Learning Program

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

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