Practice Test


Q1) The law of mass action was proposed by Show Answer


Q2) Which of the following factors influence a chemical system in accordance with the Le-Chaterlier' principle? Show Answer


Q3) Chemical reaction which proceeds only in one direction is called a/an Show Answer


Q4) When a reversible reaction acquires the equilibrium state, Show Answer


Q5) The rate at which a substance undergoes reaction is proportional to Show Answer


Q6) Which one of the following satements is correct? Show Answer


Q7) A reversible reaction is said to have attained equilibrium when Show Answer


Q8) Small value of equilibrium constant show that Show Answer


Q9) At a constant temperature, if a small amount of one of the products is removed, the equilibrium constant Show Answer


Q10) The active mass of a solid in heterogeneous equilibrium is taken as Show Answer


Q11) Le-Chatelier principle is applicable to Show Answer


Q12) The equilibrium constant in a reversible chemical reaction at a given temperature Show Answer


Q13) Which one of the following informations can be obtained on the basis of Le-Chatelier principle? Show Answer


Q14) The active mass of 64g of HI in a two litre flask would be Show Answer


Q15) The numerical value of equilibrium constant is affected by changing Show Answer


Q16) The chemical equilibrium is the state of chemical reaction at which Show Answer


Q17) Mathematical expression obtained by applying law of mass action to chemically reversible reaction is called Show Answer


Q18) Molar concentration per unit volume is called Show Answer


Q19) In an irreversible reaction Show Answer


Q20) Chemical reaction in which reactants react to form products and the products formed react with each other directly to form the original reactants back is known as _______ reaction Show Answer


Q21) A reaction in which heat is absorbed is called as an _______ reaction. Show Answer


Q22) A homogeneous reaction is one which occurs only in________ phase Show Answer


Q23) If the temperature is kept constant, the reaction which is accompanied by a decrease in volume will be favoured by increasing Show Answer


Q24) At a given pressure an endothermic reaction is favoured by increasing Show Answer


Q25) The ______ states that "In a homogeneous system at constant temperature the rate at which a substance reacts is proportional to its active mass and rate of a chemical reaction is proportional to the product of active masses of the reacting substances at that moment". Show Answer


Q26) According to Bronsted-Lowry concept a base is a substance that Show Answer


Q27) According to Lewis concept an acid is a substance which Show Answer


Q28) NaCl is a salt of Show Answer


Q29) pH of an acidic solution is Show Answer


Q30) Buffer solution is the solution which has Show Answer


Q31) The degree of dissociation of a weak electrolyte in aqueous solution Show Answer


Q32) Solutions with reserved acidity or alkalinity are known as Show Answer


Q33) The theory of ionization was put forward by Show Answer


Q34) A conjugate acid differs from its conjugate base by Show Answer


Q35) Precipitation takes place when the ionic product Show Answer


Q36) A buffer solution is a solution whose pH value on keeping in the air Show Answer


Q37) An aqueous solution of aluminium sulphate would show Show Answer


Q38) The acidic buffer solution can be prepared by mixing solutions of Show Answer


Q39) The concept that acid is proton donor and base is proton acceptor was given by Show Answer


Q40) Calculate the percent ionisation of 0.05M acetic acid Show Answer


Q41) The active mass is denoted by using the symbol Show Answer


Q42) The pH of a solution of sodium acetate will be Show Answer


Q43) Which of the following is an irreversible reaction? Show Answer


Q44) If ammonia is added to pure water, the concentration of a chemical species already present will decrease. This species is Show Answer


Q45) A example of a reversible reaction is Show Answer


Q46) Which of the following statements is correct about equilibrium constant? Show Answer


Q47) Le - Chatelier principle is not applicable to Show Answer


Q48) In the reaction, when there is no change in volume Show Answer


Q49) According to the Arrhenius concept base is a substance that Show Answer


Q50) Which one of the following is the weakest base? Show Answer


Q51) A mixture of a weak acid (say acetic acid) and its salts with a strong base (say sodium acetate) acts as a buffer solution. Which other pair of substances from the following may have similar properties? Show Answer


Q52) Which of the following is a Lewis base? Show Answer


Q53) Ionic product of water is Show Answer


Q54) Hydrogen ion concentration of neutral solution is Show Answer


Q55) Hydroxyl ion concentration of a neutral solution is Show Answer


Q56) pH of solution is defined as Show Answer


Q57) The hydroxyl ion concentration in a solution having pH 4 will be Show Answer


Q58) The unit of solubility is Show Answer


Q59) Which of the following substances on dissolving in water will give a basic solution? Show Answer


Q60) For the salt of weak acid and strong base,the hydrolysis constant is given by the expression Show Answer


Q61) A 0.2 molar solution of formic acid is 3.2% ionizes. Its ionization constant is Show Answer


Q62) The pH of 1.0 M aqueous solution of a weak acid HA is 6.0.Its dissociation constant is Show Answer


Q63) A 0.2 M solution of methanoic acid has degree of ionisation 0.032. Its dissociation constant would be Show Answer


Q64) Which of the following pairs will form a buffer Show Answer


Q65) Which one of the following is a stronger base? Show Answer