Download App

Ionic Equilibrium — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistryIonic Equilibrium1 Mark
Question
Assertion(A): When dilution increases, the degree of dissociation of weak electrolyte also increases.
Reason (R): The degree of dissociation a is inversely proportional to concentration c. When the dilution increases by 100 times, the dissociation increases by 10 times.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are wrong
(c) A is correct but R is wrong
(d) A is wrong but R is correct
✓

Answer

(a) Both A and R are correct and R is the correct explanation of A

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion And Reason." from Ionic Equilibrium→Ionic Equilibrium — all question types→Chemistry STD 12 question papers→Tamilnadu Board STD 12 question papers→Tamilnadu Board question paper generator→

Similar questions

Assertion (A) – Diborane is highly reactive.
Reason (R) – At high temperatures, diborane forms higher boranes.
→
(A): Inter molecular dehydration of alcohol is not a suitable method of prepare mixed ethers.
Reason (R): When a mixture of two different alcohols are used, mixture of different ethers are formed and they are difficult to separate.
(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R are correct but R is not the correct explanation of A.
(c) A is correct but R is wrong
(d) A is wrong but R is correct
→
(A): Phenol forms 2, 4, 6- tribromo phenol on treatment with $Br _2$ in $CS _2$ at 273 K .
Reason $( R )$ : Bromine polarizes in $CS _2$.
(a) Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
(b) Both A and are incorrect
(c) A is correct but R is wrong
(d) A is wrong but R is correct
→
QUEsION Assertion (A) : The manufacture of sulphuric acid by contact process is an example of heterogeneous catalysis.
Reason $( R )$ : The catalyst Pt (or) $VO _5$, reactants and products are in different phases in contact process.
(a) Both A and R are correct and R is the correct explanation of A .
(b) Both $A$ and $R$ are correct but $R$ is not correct explanation of $A$.
(c) Both $A$ and $R$ are wrong.
(d) A is wrong but R is correct.
→
(A): If the activation enery of a reaction is zero, temperature will have no effect on the rate constant
Reason (R): Lower the activation energy, faster is the reaction.
(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R are correct but R is not correct explanation of A
(c) A is correct but R is wrong
(d) A is wrong but R is correct
→
Assertion (A) – Noble gases have the largest ionisation energy compared to any other elements.
Reason (R) – Noble gases have incomplete filled orbital.
→
Assertion (A) : Adsorption is a spontaneous process.
Reason (R) : Adsorption is always accompanied by decrease in free energy. When molecules are adsorbed, there is always a decrease in randomness of the molecules.
(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R are correct but R is not correct explanation of A.
(c) Both A and R are wrong.
(d) A is correct but R is wrong.
→
(A): $5 Br _{\text {(aq) }}^{-}+ BrO _{3 \text { (aq) }}^{-}+6 H ^{+} \rightarrow 3 Br _2$ (l) $+3 H _2 O _{(1)}$.
The overall order of the reaction is equal to 4.
Reason (R): The experimental rate law is.
Rate $= K \left[ Br ^{-}\right]\left[ BrO _3^{-}\right]\left[ H ^{+}\right]^2$.
So $1+1+2=4$ order value is 4 .
(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R are wrong
(c) A is correct but R is wrong
(d) A is wrong but R is correct
→
The cell potential of mercury cell is 1.35V which remains constant.
Reason (R): In mercury cell, the electrolyte is a paste of KOH and ZnO.
(a) Both A and R are correct, but R is not the correct explanation of A
(b) Both A and R are correct, but R is the correct explanation of A
(c) A is wrong but R is correct
(d) A is correct but R is wrong
→
Assertion(A) – Sulphide ores are concentrated by froth floatation process.
Reason (R) – Sulphide ores are preferentially wetted by oil can be separated from gangue.
(a) A and R are correct, R explains A
(b) A and R are correct, R does not explains A
(c) A is correct but R is wrong
(d) A is wrong but R is correct
→