Hence no. There are questions regarding colloids, emulsion, catalysis reaction, reasons for a decrease in physisorption, etc. We hope the NCERT Exemplar Class 12 Chemistry Chapter 3 Electrochemistry help you. Advertisement. | Class 12 Chemistry Electrochemistry: Faradays Laws of Electrolysis: Faraday’s Laws of Electrolysis. Potassium crystallizes in a body-centered cubic lattice. If the effective radius of an atom of iron is 124 pm, compute the density of iron in both these structures. NCERT Solutions for Class 12 Chemistry: The NCERT solutions provided here will enhance the concepts of the students, as well as suggest alternative methods to solve particular problems to the teachers.The target is to direct individuals towards problem solving strategies, rather than solving problems in one prescribed format. Silver has a cubic unit cell with a cell edge of 408 pm. Advertisement. The fifth chapter in chemistry class 12 gives a brief idea about the chemical reaction related to solid-liquid, solid-gas and liquid-gas. Nov 20, 2020 - Practice Questions(Solved) - Solid State, Class 12, Chemistry | EduRev Notes is made by best teachers of Class 12. This shows that it has a face-centered cubic cell. Que 1. This equation was named after a German physicist Walther Nernst. Que 9: Iron occurs as BCC as well as FCC unit cell. M.R.P 95/-95.00-Go to store: Product Description view Description. Numerical Problems in Chemistry Class- 12. Nov 11, 2020 Dr. Vikas Jasrotia. What is the formula of the compound? Numerical Problems in Chemistry Class- 12. The number of ions in a face-centered unit cell is 4. Question- An organic compound X contains 70% Carbon, 11.33% Hydrogen and 18.67% Oxygen. For More Information  About Solid State Chemistry Numericals Stay Tunned, Your email address will not be published. Leave a Reply Cancel reply. The atomic mass of potassium = 39. Calculate the packing fraction for the Ca unit cell, given that Ca crystallizes in a face-centered cubic unit cell. Product Details Publisher (APC) Avichal Publishing Company Publication Year 2017 Language English ISBN_10 8177394126 ISBN_13 9788177394122. It is also not a recommended browser due to security and privacy issues. (ii) Equivalence point of filtration: It is defined as the theoretical point in titration when equal gm of acid neutralizes equal gm of base. A solid has a cubic structure in which X atoms are located at the corners of the cube, Y atoms are at the cube centers and O atoms are at the edge centers. O atom is present at each of the edge centers (number of edges of cube = 12) And each O atom present at the edge center will make 1/4 contribution towards the unit cell. Physical Chemistry by P Bahadur is a good book for JEE preparation, because it has lots of solved and unsolved numerical problems. 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Ans 2. The Nernst Equation empowers the assurance of cell potential under non-standard conditions and relates the measured cell potential to the reaction quotient and permits the exact measurement of equilibrium constants. Class 12 Chemistry Electrochemistry: Nernst Equation: Nernst Equation. If the anion has a radius of 250 pm, what should be the ideal radius of the cation? Ans 6. Ans 11: As A+ B– has a NaCl structure, A+ ions will be present in the octahedral voids. Can a cation C+ having a radius of 180 pm be slipped into the tetrahedral site of the crystal A+ B–? Calculate the molality of the solution. Class 12 Class 12 Chemistry Properties and Applications of Colloids. Gold has a close-packed structure which can be viewed as-spheres occupying 0.74 of the total volume. It is defined as the no. \ Number of atoms present in a unit cell = 4 Since the unit cell contains 4 atoms per unit cell, silver has a face-centered cubic lattice. Your email address will not be published. What is the structure of silver? Click here to find out more. MCQs & Assertion Reason Haloalkanes and Haloarenes, Solved Important Questions d & f Block Elements, Preparation and Properties of Potassium Permanganate and Potassium Dichromate. Ans 3: One-eight of each corner atom and one-half of each face-centered atom is contained within the unit cell of Ca giving. If NaCl is doped with 10–3 mol percent of SrCl2, what is the concentration of cation vacancy? 8gm of oxygen and 35.5 gm of chlorine. As the radius of the cation C+ (180 pm) is larger than the size of the tetrahedral site, it cannot be slipped into it. Calculate: (a) The distance between the appositively charged ions in the lattice. Required fields are marked *. of A atoms = 8 × 1/8  = 1. Given: mass of solute (KCl) = 7.45 g, mass of solvent (water) = 100 g = 0.1 kg. Que 4. Science > Chemistry > Solutions and Their Colligative Properties > Numerical Problems on Molality. UCBrowser does not support all the features of this site. The post-Solid State Chemistry Numericals contain all important questions related to the topic. What is the approximate number of unit cells in 4.0g of potassium? The ideal radius of the cation will be equal to the radius of the octahedral void because in that case it will touch the anions and the arrangement will be closely packed. Class 12 Class 12 Chemistry The Colloidal State Preparation and Purification. Number of unit cells in 28.88 cm3 = 28.88/23.9 × 10-24 = 12.08 × 1023 unit cells. Ans 10: Length of the edge of unit cell = 408 pm, Volume of unit cell = (408 pm)3 = 67.92 ´ 10–24 cm3, = 10.6g cm–3 ´ 67.92 ´ 10–24 cm3 = 7.20 ´ 10–24g, Mass of unit cell = No. of atoms in unit cell ´ Mass of each atom, Now, mass of each atom = Atomic mass/Avogadro number = 108/6.023 ´ 1023 = 1.79 ´ 10–22g, Let the unit cell contains ‘n’ atoms, so that Mass of unit cell = n ´ 1.79 ´ 10–22 = 7.20 ´ 10–22. Que 12: A solid A+ B– has a NaCl type close-packed structure. Que 8: NH4Cl crystallizes in a body-centered cubic lattice, with a unit cell distance of 387 pm. Que 3. Que 6: In a cubic lattice, the closed packed structure of mixed oxides of the lattice is made up of oxide ion; one eight of the tetrahedral voids are occupied by divalent ions (A2+) while one-half of the octahedral voids are occupied by trivalent ions (B3+). Ans 9: In a body-centered unit cell, atoms touch each other along the cross diagonal. Que 10. Product Details Publisher (APC) Avichal Publishing Company Publication Year 2017 Language English ISBN_10 8177394126 ISBN_13 9788177394122. Ans 5: Volume of the unit cell = (288 × 10–10)3 = 23.9 × 10–24 cm3, Volume of 208 g of the element = 208/7.2 = 28.88 cm3. Called as ‘New Pattern Numerical Ability’, P Bahadur Physical Chemistry book covers almost all the topics of the JEE syllabus. NCERT Exemplar Problems Maths Physics Chemistry Biology. Proudly powered by WordPress Number of atoms of X per unit cell = 8 ´ 1/8 = 1, Y atom is present at the body center, thus the contribution of Y towards unit cell = 1 ´ 1 = 1. How many atoms of silver are there in the unit cell? If you have any query regarding NCERT Exemplar Class 12 Chemistry Chapter 3 Electrochemistry, drop a comment … Concentration of cation vacancies = concentration of Sr2+ ion in the crystal, \ Number of cationic vacancies per mol = 10-3 × 6.022 × 1023 / 100. What is the formula of the oxides? Que 7: A compound formed by elements A and B crystallizes in a cubic structure where A atoms are at the corners of a cube and B atoms are at the face center. English Elective - CBSE (Functional English) 2007 to 2019, Amines - Identification of Primary, Secondary and Tertiary Amines. Let there be n no. (b) the radius of the NH4+ ion if the radius of the Cl– ion is 181pm. Numerical Problems in Chemistry Class - 12 PUC Karnataka Science Class 12. This document is highly rated by Class 12 … Que 11. B atoms are at the face center of six faces. How many atoms does 208 g of the element contain? M.R.P 95/-95.00-Go to store: Product Description view Description. Ans 7: A atom is eight corners of the cube. Que 2. The density of metal is 7.2 g cm–3. of O2– in the crystal. Radius of the octahedral void = A r+ = 0.414 ´ rB – = 0.414 ´ 250 = 103.4 pm, Radius of the tetrahedral site = 0.225 ´ rB– = 0.225 ´ 250 pm = 56.25 pm.

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