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New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Ans: Correct Option: (i)
(i) Electrolysis of sodium chloride is represented by the following equations
H+ (aq)+ e−→12H2 (g)
At the anode, the reaction goes this way,
Cl− (aq)→12Cl2 (g) + e− E cell =1.36V
2H2O (aq)→O2 (g) + 4H+ (aq)+ 4e− E cell =1.23V
The reaction with the lower value Ecell is preferred but the formation of oxygen requires overpotential
Therefore, the assertion is correct, the reason is correct and the reason is the correct explanation for assertion. Therefore, this option is correct
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: A
Both the assertion and the reason are valid, and the reason is a correct of the assertion since the enthalpy of reaction is the difference between the total enthalpy of the reactants and products in the presence of a catalys
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Ans: Correct Option: (i)
(i)Mercury cells give a steady potential. The reason is that the ions are not involved in this reaction. The assertion is incorrect and the reason is correct so this option is incorrect
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Ans: Correct Option: (i)
(i) Molar conductivity of weak electrolytes increases on dilution. In addition to solution the degree of dissociation increases leading to an increase in the number of ions produced. Therefore, Λm shows a sharp increase.
Therefore, the assertion is correct, the reason is correct and the reason is a correct explanation for assertion.
(ii) Assertion is correct, the reason is correct and the reason is the correct explanation of assertion. Therefore, this option is incorrect
(iii)Assertion and true both are correct therefore
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: E
The order and molecularity may or may not be the same, assertion is false, but reason is right. The sum of the power of the reactants is the order of reaction, which may be easily determined. The total of the stoichiometric coefficient of the rate-determining elementary step determines molecularity
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct Option: (i)
Ans: (i) Conductivity is due to the movement of ions. The number of ions present per unit volume decides the conductivity. It decreases on dilution. The number of ions per unit volume decreases on dilution. So, the assertion is correct, the reason is correct and the reason is the correct explanation of the assertion. Therefore, this option is correct
(ii) Assertion is correct, the reason is correct and the reason is the correct explanation of assertion. Therefore, this option is incorrect
(iii) Assertion and true both are correct therefore this
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: B
Both assertion and reason are valid, but reason does not explain assertion because the order of reaction can be zero or even fractional because the order of reaction is proportional to the total of the power of the reactants.
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Ans: Correct Option: (iii)
(i)A chemical reaction is spontaneous when the Gibbs free energy is negative. This is possible when Ecell is positive. Ecathode < Eannode .Therefore, the assertion is correct and the reason is incorrect and the reason is not a correct explanation of assertion. Therefore, this option is incorrect
(ii) Ecathode < Eannode reaction is spontaneous when the Gibbs free energy is negative. This is possible when Ecell is positive. Ecathode < Eannode . Therefore, the assertion is correct and the reason is incorrect. Therefore, this option is co
New answer posted
a year agoContributor-Level 10
This is a Assertion and Reason Type as classified in NCERT Exemplar
Ans: Correct Option: (iii)
(i)The electrode potential of Cu2+/Cu is negative. The electrode potential of 2H+/H2 is 0.00V. Therefore, the assertion is correct and the reason is incorrect and the reason is not a correct explanation of assertion. Therefore, this option is incorrect
(ii) E Cu2+/Cu is not negative so the reason is incorrect. Therefore, this option is incorrect
(iii) The electrode potential of Cu2+/Cu is negative. The electrode potential of 2H+/H2 is 0.00V. Therefore, the assertion is correct and the reason is incorrect. Therefore, this opt
New answer posted
a year ago
Contributor-Level 10
This is a Matching Type Question as classified in NCERT Exemplar
(i)- (b) ; (ii)- (a) ; (iii)- (d); (iv)- (c)
The rate rule was discovered experimentally and can be used to predict the reaction rate and reactant concentrations.
The rate constant is the proportionality constant that describes the relationship between the molar concentration of the reactants and the rate of a chemical reaction.
The rate constant (k) of a reaction is proportional to its temperature, i.e., for a given reaction at a given temperature, the rate constant (k) is constant.
The order of a reaction is a quantity that has been empirically determined. As a result
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