1
 When a system is in equili-brium state
     1) The concentration of products
     is equal to the concentration of the reactants
     2) The ratio of the product of
     active masses of products and reactants is constant
     3) Number of moles of reactants
     and products is the same
     4) The ratio of rate constants of
     the forward and backward reaction is always unity
 2
     A catalyst
     1) Alters the equilibrium
     constant
     2) Increases the equilibrium
     concentration of products
     3)  Helps establishing the
     equilibrium quickly    
     4) Supplies energy to the
     reactants
 
 3
     Melting of ice, according to Lechatlier's principle is favo-ured at    
     1)  High T, high P
     2)  High T, low P
     3)  High P, low T
     4)  Low T, low P
 
 4
     For the decomposition of lime stone, forward reaction is fa-voured by            
     1) Adding CaCO3
     2) Removing CaO    
     3) Removing CO2    
     4) All    
 
 5
     At low temperature, Nitrogen dioxide, a reddish brown gas gets associated to form the colorless dinitrogen tetroxide as in the reaction. Then equili-brium
     1) There would be an increase in
     color intensity
     2) The mixture would become
     colorless
     3) There would be an decrease in
     color intensity
     4) There would be no change
 6
     
 A mixture of 2 moles of N2 and 8 moles of H2 are heated in a 2 lit vessel, till equilibrium is established. At equilibrium, 0.4 moles of N2 was present. The equilibrium concentration of   H2 will be
 1) 2 mole / lit    2) 4 mole / lit    3) 1.6 mole / lit    4) 1 mole / lit
 
 7
 
 A mixture of 0.3 mole of H2 and 0.3 mole of  I2 is allowed to react in a 10 lit vessel at 5000C. If Kc of  is 64, the amount of unreacted I2 at equi-librium is
 1) 0.15 mole    2) 0.24 mole    3) 0.03 mole    4) 0.06 mole
 
 8
 
 Melting of ice, according to Lechatlier's principle is favo-ured at    
     1)  High T, high P
     2)  High T, low P
     3)  High P, low T
     4)  Low T, low P
 
 9
 For the decomposition of lime stone, forward reaction is favoured by            
     1) Adding CaCO3    
     2) Removing CaO
     3) Removing CO2     4) All
 
 10
 Among the following, the str-onger acid in basic medium is onger acid in basic medium is
     1) Aniline              2) Phenol    
     3) Ammonia    4) Benzene
 
 11
 
 When 0.1 mole of an acid is added to 2 lit of a buffer solution, the PH of the buffer decreases by 0.5. The buffer capacity of the solution is
     1) 0.6      2) 0.4  3) 0.2  4) 0.1
 
 12
 
 The solution of PH6 is diluted by 10 times. The change in PH is ?
     1) 1        2) 0.7      3) 2      4) 0.2
 
 13
 
 Which of the following salt can't undergoes hydrolysis
     1) KCl       2) NH4Cl      3) CH3COONH4 4) CH3COONa   
 
 14
 An acid HA is 40% dissociated in an aqueous solution. The hydronium ion concentration of its 0.2 M solution would be
     1) 0.01 M    2) 0.4 M    
     3) 0.2 M    4) 0.08 M
 
 15
 The PH of an acid buffer can be raised by 2 units by
     1) Increasing the concentration
     of both weak acid and salt by two moles
     2) Increasing the concentration
     of both the acid and salt by 10 times
     3) Diluting the solution by 10
     times
     4) Increasing the concentration
     of the salt by 10 times and decreasing concentration of the acid by 10 times
 
 16
 Assertion(A):when small amount of acid or base is added to pure water, its PH undergoes a change
     Reason (R) : Addition of an acid or a base increases the degree of ionization of water.
     1) If both A and R are correct and
     R is the correct explanation of A
     2) If both A and R are correct but
     R is not the correct expla- nation of A
     3) If A is correct, but R is
     incorrect
     4) If A is incorrect but R is
     correct
 
 key
 
 1)2    2)3    3)1    4)3    5)3    
 
 
 6)3    7)4    8)1    9)3    10)2
 
 
 11)4    12)2    13)1    14)4   15)4
 
 
 16)3