Ionic Equilibrium

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Questions and Answers

What is a base according to the Lewis concept?

  • A substance that can accept a proton
  • A substance that can furnish a pair of electrons to form a coordinate bond (correct)
  • A substance that can accept a pair of electrons
  • A substance that can donate a proton

Which of the following is NOT a Lewis acid?

  • HCl (correct)
  • H2SO4
  • SiF4
  • BF3

What is the key difference between a Bronsted base and a Lewis base?

  • A Bronsted base is a stronger base than a Lewis base
  • All Bronsted bases are also Lewis bases, but not all Lewis bases are Bronsted bases (correct)
  • A Lewis base is always a stronger base than a Bronsted base
  • A Lewis base can donate a pair of electrons, but a Bronsted base cannot

Which of the following molecules can act as a Lewis acid?

<p>CO2 (D)</p> Signup and view all the answers

What is the characteristic of a Lewis acid?

<p>It can accept a pair of electrons (C)</p> Signup and view all the answers

What is a characteristic of Bronsted-Lowry concept?

<p>It includes ionic species to act as acids or bases (B)</p> Signup and view all the answers

Which of the following is a conjugate acid-base pair?

<p>HCl and ClO4- (C)</p> Signup and view all the answers

What is a limitation of Bronsted-Lowry concept?

<p>It can explain the acid-base reactions in non-aqueous medium (B)</p> Signup and view all the answers

According to Lewis concept, what is the definition of an acid?

<p>An electron pair acceptor (B)</p> Signup and view all the answers

What is a characteristic of substances like BF3 and AlCl3?

<p>They do not have hydrogen and cannot give a proton (A)</p> Signup and view all the answers

What is the primary characteristic of protogenic solvents?

<p>They have the tendency to produce protons (D)</p> Signup and view all the answers

According to Arrhenius concept, what type of ion do bases ionize to furnish in water?

<p>OH- ions (C)</p> Signup and view all the answers

In a reaction between a strong electrolyte and a weak electrolyte, which electrolyte will primarily provide the fluoride ions?

<p>The strong electrolyte (C)</p> Signup and view all the answers

What is the main limitation of the protonic definition of acids and bases?

<p>All of the above (D)</p> Signup and view all the answers

Which type of solvent is capable of acting as both a proton donor and a proton acceptor?

<p>Amphiprotic solvent (C)</p> Signup and view all the answers

What is the primary characteristic of strong electrolytes in terms of degree of ionization?

<p>They have an α value of nearly 1 (B)</p> Signup and view all the answers

Which type of electrolyte undergoes decomposition when an electric current is passed through them?

<p>Electrolytic conductors (A)</p> Signup and view all the answers

What is the effect of a high dielectric constant of a solvent on its ionising power?

<p>It increases its ionising power (C)</p> Signup and view all the answers

What happens to the degree of ionization of a weak electrolyte at moderate concentrations?

<p>It is very less than 1 (B)</p> Signup and view all the answers

How do ions behave in an ionic equilibrium state?

<p>They behave osmotically as molecules (C)</p> Signup and view all the answers

What is the condition for a solution to be neutral?

<p>[H+] = [OH-] = 1 × 10^-7 M (C)</p> Signup and view all the answers

What type of salts are formed by the addition of two simple salts?

<p>Double salts (A)</p> Signup and view all the answers

What is the pH of a solution if [H+] = 1 × 10^-5 M?

<p>5 (C)</p> Signup and view all the answers

What is the concentration of H+ ions in a solution with a pH of 10?

<p>1 × 10^-10 M (C)</p> Signup and view all the answers

What is the characteristic of basic salts?

<p>They are formed by incomplete neutralization of polyacidic bases (D)</p> Signup and view all the answers

What is the relationship between the value of K w and the temperature?

<p>The value of K w increases with the increase of temperature (A)</p> Signup and view all the answers

What is the pH of a solution with a hydroxyl ion concentration of 10^(-7) M?

<p>7 (B)</p> Signup and view all the answers

What type of salt is NH 4 PO4?

<p>Mixed salt (C)</p> Signup and view all the answers

What is the characteristic of a solution with a pH less than 7?

<p>Acidic (C)</p> Signup and view all the answers

What is the relationship between the ionic product of water and the pH of a solution?

<p>The ionic product of water is less than the pH of a solution (B)</p> Signup and view all the answers

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