Given that among these compounds, water has a maximum boiling. Which of the following. Reason (R): Acidic/basic nature of a salt solution of a salt of a weak acid, and weak base depends on Ka and Kb value of the acid and, 49. 8. (iv) K will increase initially and decrease when pressure is very highSolution: 17. of ions present in the solution. 34. Following data is given for the reaction: CaCO3 (s) → CaO3 (s) + CO2 (g). Answer : NH4OH ( ammonium hydroxide ) is weak base. Based on the equation pH = – log [H+], the pH of 10-8 mol dm-3 solution of HCl should be 8. The solution is very dilute here and we know that HCl reacts with water to form hydronium ion. 22. Hence according to Le Chatelier’s Principle on increasing the temperature, the reaction will shift to forward direction. As we dilute the solution, the concentration of the solution will reduce by how much times we are diluting it. Option (i) (iii) and (iv) are the answers. Share this. The equation of disassociation of Al(OH)3will be-. You can change your choices at any time by visiting Your Privacy Controls. (iii) All the physical processes stop at equilibrium. Question = Is CLO3- polar or nonpolar ? For more information contact us at
[email protected] or check out our status page at https://status.libretexts.org. 1. (iv) The entropy of the system increases. Your email address will not be published. (iv) Bronsted Lowry as well as Lewis concept. The pH of a solution of a strong acid is 5.0. 48. Question = Is AsH3 polar or nonpolar ? Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds. Answer = SCN- (Thiocyanate) is Polar What is polar and non-polar? Where can you download ringtones for free? Polar &q... Is benzoic acid an ionic or covalent bond ? The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. By Bagus Amin - 3:23 PM - Add Comment. (iv) The sign of ∆H cannot be predicted based on this information. The equilibrium constant (K ) would be __________. They taste bitter and change the color of red litmus paper to blue. To enable Verizon Media and our partners to process your personal data select 'I agree', or select 'Manage settings' for more information and to manage your choices. A decrease in pH can be observed as a result of a large concentration of H+. Benzoic acid, C 7 H 6 O 2 (or C 6 H 5 COOH), is a colorless crystalline solid and a simple aromatic carboxylic acid.The name is derived from gum benzoin, which was for a long time its only known source.Benzoic acid occurs naturally in many plants and it serves as an intermediate in the biosynthesis of many secondary metabolites. The value of Kc for the reaction PCl5 (g) PCl3 (g) + Cl2 (g). As the temperature increases, ionization of water increases, however, the concentration of H+ ions and OH– ions are equal. Which of the following will produce a buffer solution when mixed in equal, (i) 0.1 mol dm–3 NH4OH and 0.1 mol dm–3 HCl, (ii) 0.05 mol dm–3 NH4OH and 0.1 mol dm–3 HCl, (iii) 0.1 mol dm–3 NH4OH and 0.05 mol dm–3 HCl. The pH of the Solution formed by mixing will be 4. What will be the correct order of vapour pressure of water, acetone and ether, at 30°C. In the following questions, two or more options may be correct. Explain the reason. Now since HOCl is a weak acid its dissociation will be given as-, We also know that, for a weak mono basic acid-, Hence the ionization constant of HOCl will be 2.5 × 10-5. Bases are substances that slippery to touch when in aqueous form. 30. Calculate its ionisation constant. The Hybridisation of N is sp3 and B is sp2. Ka for CH3COOH is 1.8 × 10–5 and Kb for NH4OH is 1.8 × 10–5. When diluted 100 times [h+] = 10-5/100 = 10-7mol/L. How much will a midwifery schooling cost? Do point and ether have a minimum boiling point? (iv) The opposing processes occur at the same rate and there is dynamic, 4. For the reaction H2(g) + I2(g) → 2HI (g), the standard free energy is ∆G > 0. ɪ k / is a white (or colorless) solid with the formula C 6 H 5 CO 2 H. It is the simplest aromatic carboxylic acid.The name is derived from gum benzoin, which was for a long time its only source.Benzoic acid occurs naturally in many plants and serves as an intermediate in the biosynthesis of many secondary metabolites. How can you become a state representative? In order to help students complete and succeed in their journey, BYJU’s keeps a track of all the progress that student’s make and offers feedback on regular intervals after some assessment. Benzoic acid is a weak acid. However, in class 11, students will be exploring the topic in detail and they will have to study numerous laws, characteristics of equilibria, ionization, pH scale and more. 35. (Atomic mass of Al = 27 u). How did Eli Whitney change things socially? 18. The salts and esters of benzoic acid are known as benzoates . Which of the above base is the strongest? (i) In equilibrium mixture of ice and water kept in perfectly insulated flask. (iv) The equilibrium constant for a reaction with negative ∆H value decreases, 6. What will be the value of pH of 0.01 mol dm–3 CH3COOH (Ka = 1.74 × 10–5 )? A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. However, it is observed to be less than 7.0. What will be the pH of the solution obtained after diluting the given solution 100 times? On increasing the pressure, in which direction will the gas-phase reaction, proceed to re-establish equilibrium, is predicted by applying Le Chatelier’s, Which of the following is correct, if the total pressure at which the equilibrium. The decreasing order of bases based on the ionisation constant at Equilibrium will be;-, Di-methylamine > Ammonia > Pyridine > Urea. Where can you find the new version song of dota? A reaction between ammonia and boron trifluoride is given below: Identify the acid and base in this reaction. The value of Kc for the reaction 2HI (g) ⇋ H2 (g) + I2 (g) is 1 × 10-4. Answer = ICl3 (Iodine trichloride) is Polar What is polar and non-polar?