MCQs PDF - Chemistry Past Paper

1] The product of molar concentration of hydrogen ion and anion divided by the molar concentration of unionised acid is equal to A] Ionisation constant of weak base B] Ionic product C] Ionisation constant of weak acid D] Degree of hydrolysis 2] Which of the following factor does not affect the degr...

1] The product of molar concentration of hydrogen ion and anion divided by the molar concentration of unionised acid is equal to A] Ionisation constant of weak base B] Ionic product C] Ionisation constant of weak acid D] Degree of hydrolysis 2] Which of the following factor does not affect the degree of ionisation? A] Nature of electrolyte B] Concentration of electrolyte C] Temperature D] Reftractive index 3] The solution which resist the change in pH is known as A] Acid B] Base C] Buffer D] Electrolyte 4] Mixture of aqueous solution of ammonium hydroxide and ammonium chloride will produce A] Acidic buffer B] Basic buffer C] Potassium acetate D] Potassium chloride 5] What will be the pH of acidic buffer solution? A] 10 B] 11 C] Less than 7 D] More than 7 Page 1 of 4 6] The electrolyte which dissociate almost completely is known as A] Strong electrolyte B] Weak electrolyte C] Moderate electrolyte D] Non electrolyte 7] Solubility product of sparingly soluble salt is represented as A] Kw B] h C] Ksp D] Kh 8] In an isothermal process which of the following remain constant? A] Volume B] Temperature C] Heat D] Pressure 9] Entropy of all perfectly crystalline substance is zero at absolute zero temperature is the statement of which law of thermodynamics? A] First law of thermodynamics B] Second law of thermodynamics C] Third law of thermodynamics D] Zeroth law of thermodynamics 10] First law of thermodynamics is the law of A] Entropy B] Free energy C] Conservation of energy D] Mass action 11] The chemical thermodynamics is the branch of chemistry which deals with the study of A] Potential energy B] Electrical energy C] Mechanical energy Page 2 of 4 D] Thermal energy 12] Entropy is a measure of A] Concentration B] Velocity C] Order D] Disorder 13] Which is weak electrolyte? A. Sulfuric acid B. Acetic acid C. Hydrochloric acid D. Sodium hydroxide 14] The ratio of number of molecules ionised to the total number of molecules called as A. Degree of ionisation B. Hydrolysis constant C. Degree of hydrolysis D. Solubility product 15] What is pH of 0.001 M aqueous HCl solution? A. 1 B.2 C. 3 D. 4 16] Mixture of aqueous solution of acetic acid and sodium acetate will produce A. Acidic buffer B. Basic buffer C. Potassium acetate D. Potassium chloride 17] Which is correct equation? A. pH + pOH = 14 B. pH + pOH = 7 C. pH + pOH = 1 D. pH + pOH = 10 18] The phenomenon of interaction of cations and anions of salt with hydrogen ions and hydroxyl ions by water yielding acidic and basic solutions is known as A. Neutralisation B. Ionic equilibria C.Salt hydrolysis D. Ionisation 19] The concentration of solute in saturated solution is called as A. Reduction B. Hydrolysis C. Dissociation D. Solubility 20] For supersaturated solution the ionic product is A. Lesser than solubility product B. Greater than solubility product C. Equal to solubility product D. 5 cm Page 3 of 4 21] The product of molar concentration of hydrogen ion and anion divided by the molar concentration of unionised acid is equal to A. Ionisation constant of weak base B. Ionic product C. Ionisation constant of weak acid D. Degree of hydrolysis 22] Which of the following factor does not affect the degree of ionisation? A. Nature of electrolyte B. Concentration of electrolyte C. Temperature D. Reftractive index 23] The solution which resist the change in pH is known as A. Acid B. Buffer C. Base D. Electrolyte 24] Mixture of aqueous solution of ammonium hydroxide and ammonium chloride will produce A. Acidic buffer B. Basic buffer C. Potassium acetate D. Potassium chloride 25] What will be the pH of acidic buffer solution? A. 10 B. 12 C. Less than 7 D. More than 7 26] What is pH of 0.001 M aqueous NaOH solution? A. 11 B.10 C. 9 D. 8 27] The electrolyte which dissociate almost completely is known as A. Strong electrolyte B. Weak electrolyte C. Moderate electrolyte D. Non conductor 28] Solubility product of sparingly soluble salt is represented as a. Kw B. h C. Ksp D. Kh 29] The value of ionic product of water is A. 1× 10 -8 B. 1× 10 -8 C. 1× 10 -14 D. 1× 10 -5 Page 4 of 4