|
1) A substance which increases the rate of reaction is called a. catalyst b. reactant c. product d. coordinator
|
||||
|
2) If the concentration, temperature, and pressure is changed, the system responds in a way that a. follows the change b. opposes the change c. does not change at all d. encourages the change
|
||||
|
3) The conditions for equilibrium of concentration of reactant and products will be the same if a. temperature is constant b. pressure or volume is constant c. concentration of products and reactants are same d. all of above
|
||||
|
4) A reversible reaction a. always completes b. never goes to completion c. spontaneous reactions d. non spontaneous reactions
|
||||
|
5) What is the term used for a state of a chemical reaction in which forward and reverse reactions take place at the same rate? a. chemical equilibrium b. stable reaction c. reversible reaction d. forward reaction
|
||||
|
6) Which of the following has made it possible to get the maximum amount of products? a. Le Chatellier's principle b. Charle's law c. Boyle's law d. Snell's law
|
||||
|
7) Unit of the equilibrium constant for N2O4 2NO2 is a. mol dm-4 b. mol dm-3 c. dm3mol-1 d. mol dm-3
|
||||
|
8) Which of the following statements about the equilibrium constant is not true? a. it is very useful b. it is independent of the initial concentration of reactants c. it does not depend upon temperature d. it depends upon temperature
|
||||
|
9) The law of mass action was proposed by a. Newton b. Le Chatellier c. C.M Guldberg and P.Waage d. Lewis
|
||||
|
10) Which of the following reactions causes acid droplets to spew in all directions? a. acid base reaction b. combustion c. vigorous reaction d. decomposition
|
||||
|
11) Kf and Kr are a. equilibrium constants b. reaction constants c. chemical constants d. rate constants
|
||||
|
12) Substances which increase the rate of a chemical reaction are called a. proteins b. single cell protein c. enzymes d. catalysts
|
||||
|
13) The ratio of the product of the concentration of products to the product of the concentration of reactants is called a. equilibrium constant b. equilibrium ratio c. reverse reaction d. forward reaction
|
||||
|
14) In equilibrium constant expression, the concentration of reactants is taken in/on the a. right side b. left side c. numerator d. denominator
|
||||
|
15) Unit of the equilibrium constant for CO + 2H2 CH3OH is a. no units b. mol dm-3 c. dm3mol-1 d. [mol dm-3]-2
|
||||
|
16) What is represented by each figure within a square bracket in the equilibrium expression? a. concentration in mol.dm-3 b. volume of products c. mass of products d. mass of reactants
|
||||
