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1) 1.0g mole of ethyl alcohol and 1.0g mole of acetic acid are mixed. At equilibrium 0.666g mole of the ester is present. The value of the equilibrium constant is

2) If the equilibrium constant KC value for a certain reaction is very small, then:

3) The rate of a reaction involving ions can be studied by the method

4) The rate expression of a reaction is, Rate = k[A][B]²
What happens to the rate of reaction if concentrations of A and B are doubled?

5) Which of the followings is a pseudo-first-order reaction?

6) For the gas phase reaction
2X+Y ⇋ 2Z  ∆H= -ive kJ/mol. The yield of Z at equilibrium could be increased by

7) Following is an exothermic reaction
A+ B ⇌ C+ D. Which is the correct statement

8) Catalyst can change

9) One of the following is not a physical method for determination of the rate of reaction

10) All are correct about zero order except

11) The difference in energy between reactants and the transition state is called

12) For the first-order reaction, the half-life is related to the expression k t_1/2 = 0.693. Half-life is the 1
A. Time is taken for the conc. of the product to increase to half of its original value.

13) Which one of the following factors does not affect the equilibrium position?

14) A buffer is prepared by mixing the solutions of equimolar acetic acid and sodium acetate. The pH should be equal to

15) The rate of chemical reaction roughly doubles for every 10°C rise in temperature. If the temperature is raised by 20°C, the rate may increase

16) 2HI_(g) ⇌ H_2(g) + I_2(g)
For the above reaction if Kc is 0.25, then Kp for
this reaction will be

17) Rate of an exothermic reaction is increased by increasing all except

18) The half-life of the reaction becomes half when initial concentrations of reactants are doubled. The order of the reaction will be

19) The solubility product of a salt AB is 0.25 mol²/dm⁶. What will be its solubility (mol/dm³)

20) If the value of the Kc is large then it shows that the products are:

21) The pKa value of CH₃COOH is 4.74. The pH of an equimolar solution of acetic acid and sodium acetate is:

22) In a reaction 2X + Y → M + N
If the concentration is of Y kept constant and that of X is tripled. The rate of reaction will

23) 2X+Y ⇌ Z At equilibrium 0.20 mole of X, 0.45 mole of Y and 0.15 mole of Z are present, Calculate Kc

24) The pH of buffer in which concentrations of salt and base are 0.1M and 0.01M respectively
(pKb = 4.0)

25) In N₂ +3H₂ ⇌ 2NH₃ the yield of the product will be minimum if