Which one of the following reactions is incorrect?

Question

Which one of the following reactions is incorrect? (A) FeCr 2 O 4+ Na 2 CO 3+ O 2 → Na 2 CrO 4+ Fe 2 O 3+ CO 2 (B) Na 2 Cr 2 O 7+ KCl → K 2 Cr 2 O 7+ NaCl (C) K2Cr2O7+NaCl +H2SO4 → KHSO4+NaHSO4+CrO3+H2O (D) None of these

Tardigrade Admin · Accepted Answer

In reaction 3, CrO 2 Cl 2 is formed rather than CrO 3 It is chromyl chloride test.

Q. Which one of the following reactions is incorrect?

$F e C r_{2} O_{4} + N a_{2} C O_{3} + O_{2} \to N a_{2} C r O_{4} + F e_{2} O_{3} + C O_{2}$

$N a_{2} C r_{2} O_{7} + K Cl \to K_{2} C r_{2} O_{7} + N a Cl$

$K_{2} C r_{2} O_{7} + N a Cl + H_{2} S O_{4} \to KH S O_{4} + N a H S O_{4} + C r O_{3} + H_{2} O$

None of these

In reaction $3, C r O_{2} C l_{2}$ is formed rather than $C r O_{3}$ It is chromyl chloride test.

Q. Which one of the following reactions is incorrect?

FeCr2​O4​+Na2​CO3​+O2​→Na2​CrO4​+Fe2​O3​+CO2​

Na2​Cr2​O7​+KCl→K2​Cr2​O7​+NaCl

K2​Cr2​O7​+NaCl+H2​SO4​→KHSO4​+NaHSO4​+CrO3​+H2​O

None of these

In reaction 3,CrO2​Cl2​ is formed rather than CrO3​ It is chromyl chloride test.

$F e C r_{2} O_{4} + N a_{2} C O_{3} + O_{2} \to N a_{2} C r O_{4} + F e_{2} O_{3} + C O_{2}$

$N a_{2} C r_{2} O_{7} + K Cl \to K_{2} C r_{2} O_{7} + N a Cl$

$K_{2} C r_{2} O_{7} + N a Cl + H_{2} S O_{4} \to KH S O_{4} + N a H S O_{4} + C r O_{3} + H_{2} O$

In reaction $3, C r O_{2} C l_{2}$ is formed rather than $C r O_{3}$ It is chromyl chloride test.