Home
Class 11
CHEMISTRY
Assertion : On cooling a freezing mixtur...

Assertion : On cooling a freezing mixture, color of the mixture turns to pink from deep blue for a reaction. `Co(H_(2)O)_(6)^(2+)_(aq) + 4Cl^(-)_(aq) hArrCoCI_(4)^(2-)(aq) + 6H_(2)O_((l))`.
Reason : Reaction is endothermic so on cooling, the reaction moves to backward direction.

A

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

B

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

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Both assertion and reason are true and reason is the correct explanation of assertion.
`Co(H_2O)_(6)^(2+)` (Pink) while `CoCl_(4)^(2-)` (blue). So, on Cooling because of Le-chatelier’s principle the reaction tries to over come the effect of temperature.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL EQUILIBRIUM

    ERRORLESS|Exercise PAST YEARS QUESTIONS|37 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    ERRORLESS|Exercise Assertion & Reason |17 Videos

  • CLASSFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    ERRORLESS|Exercise Assertion & Reason |14 Videos

Similar Questions

Explore conceptually related problems

Assertion (A) : On cooling in a freezing mixture, colout of the mixture turns to pink from deep blue for a reaction. underset(("Pink"))(Co(H_(2)O)_(6)^(2+))(aq)+4CI^(Theta)hArr underset((Blue))(CoCI_(4)^(2-)(aq))+6H_(2)O(l) Reason (R) : The reaction is endothermic in formed reation, so on cooling the reaction, deep blue colour appears.

CoCl_(4)^(2-)(aq) is blue in color while [Co(H_(2)O)_(6)]^(2+) is pink. The color of reaction mixture Co(H_(2)O)_(6)^(2+)(aq)+4Cl^(-)(aq)hArr CoCl_(4)^(2-)(aq)+6H_(2)O(l) is blue at room temprature while it is pink when cooled heance

Observe the following reaction, 2NO_(2)(g) + 2OH^(-)(aq) to NO_(3)^(-)(aq) + H_(2)O (l) + NO_(2)^(-) (aq) in this reaction,

(iii) H_(2)SO_(4(aq)) + NaOH_((aq)) to Na_(2)SO_(4(aq)) + H_(2)O_((I))

For the reaction S_(2)O_(3)^(2-)(aq) +2H_(3)O^(+)(aq) hArr S(s)+H_(2)SO_(3)(aq)+H_(2)O(l) Rate =k[H_(3)O^(+)][S_(2)O_(3)^(2-)] Reaction is fastest in

The electrode with reaction :Cr_(2)O_(7)^(2-)(aq)+14H^(o+)(aq)+6e^(-) rarr 2Cr^(3+)(aq)+7H_(2)O can be represented as

The reaction, 2H_(2)O(l) to 4H^(+)(aq.)+O_(2)(g)+4^(-) is