Reason is the correct explanation for assertion. Assertion is true but the reason is False. As the amount of water increases more and more electrolyte solution dissociates therefore its degree of dissociation increases. CBSE Class 12 Exam 2021 - Exam Pattern and New Marking Scheme. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. Assertion : Λ m for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Assertion : Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Therefore, limiting molar conductivity, Ëm° cannot be obtained by extrapolation of molar conductivity to zero concentration. Question From class 12 Chapter Electrochemistry, Both assertion and reaction are true and the reason is correct explanation for assertion, Both assertion and reason are true and reason is not correct explanation for assertion. ) Assertion : Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. MHA unlock guidelines Schools, Colleges can run at 50% hall capacity. Thus, the degree of dissociation can be calculated at any concentration α = Λmc / Λm° The degree of dissociation in a weak electrolytic increases. of Integrals, Continuity What happens Δ^0m for weak electrolytes obtained by using Kohlrausch law if the migration of ions is increased to three. Storonger is the acid weaker is its conjugate base. of Parallelograms and Triangles, Introduction NEET 2021 will be conducted in the first week of May 2021. JEE Main 2021: January Session likely to be postponed to February. (ii) Both assertion and reason are true and the reason is not the correct explanation of assertion. NEET 2021 Registration, Exam Pattern, Syllabus, Eligibility Details & More. If a small amount of a strong electrolyte like Ammonium chloride (NH 4 Cl) is added to the aqueous solution of NH 4 OH, it gets dissociated and equilibrium exists, as. Assertion. for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Assertion A: The molar conductance of weak electrolyte is low as compared to that of strong electrolytes at moderate concentrations. equilibrium constant, called the dissociation constant. MHA Unlock Guidelines Schools, Colleges can Run at 50 Percent Hall Capacity. An acid is a substance which furnishes a proton or accepts an electron pair whereas a base is proton acceptor or electron pair donor.
Reason. to Trigonometry, Complex The Λm of ‘B’ increases 1.5 times. why degree of dissociation of weak electrolyte increases with increase of dilution? and Differentiability. How does dilution affect the conductivity of strong electrolytes and weak electrolytes ? Electrolyte conductivity increases with a rise in temperature, as the viscosity of the solvent decreases exponentially, and the degree of dissociation increases. Where ‘K b ’ is dissociation constant of the base.. JEE Main 2021 January session likely to be postponed to February. ... As a result, the diffusion coefficient of this gas increases x times. Apne doubts clear karein ab Whatsapp (8 400 400 400) par The degree of dissociation of a weak electrolyte increases Ask for details ; Follow Report by Panky2 25.03.2018 Log in to add a comment Henderson Haselbalh buffer solution equation give that just on1908 as well 22 Years later . At infinite dilution, the percentage ionisation for both strong and weak electrolytes is. Know MHA unlock guidelines, unlock 6.0 & education institutions guidelines. Dissociation increases with dilution because each molecule requires certain amount of energy to break bonds. Choose the correct answer out of the following choices. (iii) Assertion is true but the reason is false. The limiting value of molar conductance (Λm) corresponds to degree of dissociation equal to 1, i.e. and Inverse Proportions, Areas to Euclids Geometry, Areas Check complete JEE Main 2021 exam update and other important details related to exams! Reason : For weak electrolytes degree of dissociation increases with dilution of solution. So it increases with increasing dilution. At infinite dilution, the percentage ionisation of both strong and weak electrolytes is. Assertion : Equivalent conductance of all electrolytes decreases with increasing concentration. This preview shows page 49 - 69 out of 69 pages.. (1)Fraction of dissociation of a weak electrolyte increases as electrolyte is diluted. to Three Dimensional Geometry, Application Degree of ionization of weak electrolyte increases with dilution. bhi. The value of x is . Try it now. of Derivatives, Application NEET 2020 - 5 MBBS Seats Reserved for Wards of COVID-19 Warriors.
Reason : For weak electrolytes degree of dissociation increases with dilution of solution.
Reason (R) For weak electrolytes degree of dissociation increases with dilution of solution. The degree of dissociation ... chemistry The degree of dissociation ( α ) of a weak electrolyte, A x B y is related to van't Hoff factor ( i ) by the expression :
Statement-2: No. Consider HCl, it needs a certain amount of energy to dissociate into H+ and Cl-. (ostwald's law). Know steps to download MPBSE syllabus & complete details related to the MP board exam 2021! Molar conductance of weak electrolyte increases with dilution'. Expressions and Identities, Direct Know exam pattern, new marking scheme, sample paper & more. In the following questions a statement of assertion followed by a statement of reason is given. Conversely, such electrolytes have lower molar conductivity at higher concentrations due to a reduced degree of dissociation. Statement van't Hoff factor for electrolytes is always greater than unity. As week electrolyte dissociation degree tends to zero α =>0 and (1- α)=1: K dis = α2•C. the degree of dissociation (α c) of a weak electrolyte at the concentration C mole per liter may be given by the following relation: c α = ∞ ∧ ∧ c (14) Where, Λ c is the equivalent conductance of electrolyte at concentration ‘c’ and Λ ∞ is the equivalent conductance of the same electrolyte at infinite dilution. For e.g. Related to Circles, Introduction In weak electrolyte the degree of dissociation is very small. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. MP Board Exam 2021 - MPBSE Reduces Class 10, 12 Syllabus by 30 Percent. Weak electrolytes have lower molar conductivities and lower degree of dissociation at higher concentrations which increases steeply at lower concentrations. Assertion (A) for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.
Reason : Kohlrausch's law is applicable to both strong and weak electrolytes. With the increase in dilution, the degree of dissociation increases and as a result molar conductance increases. Solution: The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. Here NH 4 + ions are common hence their concentration increases. Algebraic The ESR at −30 °C increases by a factor of 2–7 in comparison with room temperature, among other things, due … In the case of specific conductivity, it is seen that the conductivity increases as the concentration of the electrolyte increases. the whole of the electrolyte dissociates. Give reason . Solutions of two electrolytes ‘A’ and ‘B’ are diluted. Assertion : The molar conductance of weak electrolytes at infinite dilution is equal to sum of the molar conductances of cation and anion. dissociation of a weak electrolyte increases as electrolyte is diluted. Numbers and Quadratic Equations, Introduction Assertion : Conductivity of all electrolytes decreases on dilution. acetic acid (CH 3COOH), dissociation constant and degree of dissociation (α) interconnected by the expression: 2 1 c K α = −α This equation is known as Ostwald's dilution law, it is applicable for weak 1-1 electrolytes only.
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