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

2) 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

3) 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

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

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

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

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

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

9) 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.

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

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

12) 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

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

14) 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

15) All are correct about zero order except

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

17) 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?

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

19) 2HI_(g) ⇌ H_2(g) + I_2(g)
For the above reaction if Kc is 0.25, then Kp for
this reaction will be

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

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

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

23) Catalyst can change

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

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