Assertion: In acidic medium, K2Cr2O7 exists as Cr2O72- (orange) while in basic medium it is converted to CrO42- (yellow). Reason: K2Cr2O7 is hygroscopic in nature and changes colour on reaction with water.

Question

Assertion: In acidic medium, K2Cr2O7 exists as Cr2O72- (orange) while in basic medium it is converted to CrO42- (yellow). Reason: K2Cr2O7 is hygroscopic in nature and changes colour on reaction with water. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

K2Cr2O7 changes colour only with change in pH of aqueous solution.

Q. Assertion : In acidic medium, $K_{2} C r_{2} O_{7}$ exists as $C r_{2} O_{7}^{2 -}$ (orange) while in basic medium it is converted to $C r O_{4}^{2 -}$ (yellow).
Reason : $K_{2} C r_{2} O_{7}$ is hygroscopic in nature and changes colour on reaction with water.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

$K_{2} C r_{2} O_{7}$ changes colour only with change in $p H$ of aqueous solution.

Q. Assertion : In acidic medium, K2​Cr2​O7​ exists as Cr2​O72−​ (orange) while in basic medium it is converted to CrO42−​ (yellow). Reason : K2​Cr2​O7​ is hygroscopic in nature and changes colour on reaction with water.