1. A first order reaction has a rate constant of 10-2 min-1. The time required to reduce the concentration of reactants from 8g to 2g is
1) 138.6 seconds 2) 2.31 minutes 3) 138.6 minutes 4) 2.31 seconds
2. The rate of disappearance of A in the reaction 2A + 3B → 1/3 C is 2.4 × 10-3 M/sec. The rate of appearance of C is
1) 4 × 10-3 M/sec 2) 4 × 10-4 M/sec
3) 0.4 × 10-4 M/min 4) 4 × 10-4 M/min
3. For a reaction N2 + 3H2→ 2NH3, the rate of disappearance H2 is 1.2 × 10-3 gL-1sec-1. The rate of formation of NH3 is
1) 4 × 10-4 gL-1sec-1 2) 6.8 × 10-4 m/sec
3) 6.8 × 10-3 gL-1sec-1 4) 6.8 × 10-4 gL-1sec-1
4. The unit of rate and rate constant are same for a
1) First order reaction 2) Second order reaction
3) Third order reaction 4) Zero order reaction
5. For a reaction, A → P order of reaction is 9/5. Units of rate constant of the reaction is
1) mole4/5 L4/5sec-1 2) mole4/5 L4/5sec-1
3) L4/5 mole4/5 sec-1 4) sec-1
6. For a reaction A → B, the rate of reaction becomes 27 times when the concentration of A is increased three times. Order of the reaction is
1) 0 2) 2 3) 1 4) 3
7. A first order reaction has a half life of 30 min. The time required to complete the 99.9% of the reaction is
1) 300 min 2) 30 min 3) 300 sec 4) 30 sec
8. Radio active disintegration is an example of
1) Zero order reaction 2) First order reaction
3) Second order reaction 4) Third order reaction
9. The plot of concentration of reactions Vs time is a linear with negative slope. Order of reaction is
1) Zero 2) One 3) Two 4) Three
10. For a reaction A → P, half life of the reaction is independent of concentration of A. Rate equation of the reaction is
1) Rate = K 2) Rate = K[A]2
3) Rate = K[A] 4) Rate = K[A] -1
11. For the reaction A + B → P, what will be the order of reaction w.r.t. A & B.
1) 1 w.r.t A & 1 w.r.t B 2) 2 w.r.t A & 2 w.r.t B
3) 2 w.r.t A & 0 w.r.t B 4) 1 w.r.t A & 0 w.r.t B
12. Match the graphs given in column I with the order given in column II
1) A-i, B-ii, C-iii 2) A-ii, B-iii, C-i 3) A-ii, B-i, C-iii 4) A-iii, B-ii, C-i
13. For a reaction A → P, the energy diagram is
1) +20 kJ/mol 2) +80 kJ/mol 3) -80 kJ/mol 4) -20 kJ/mol
14. The slope of the plot between log K vs 1/T is
15. The increase in concentration of the reactants lead to change in
1) ∆H 2) Activation energy 3) Order 4) Collision frequency
16. The minimum energy possessed by the reactant molecules to form activated complex is
1) Activation energy 2) Threshold energy
3) Normal energy of molecules 4) None of these
17. Half life period of a first order reaction is 30 min. What percentage of the reaction will be completed in 100 minutes is
1) 25 % 2) 50 % 3) 75 % 4) 90 %
18. Temperature coefficient of a reaction is 3. If Temperature is increased from 25°C to 85°C, rate constant increases by
1) 3 times 2) 27 times 3) 729 times 4) 243 times
19. Base catalyzed ester hydrolysis follows .... order Kinetics
1) 0 2) 1 3) 2 4) 3
20. For a reaction P + Q → Z, rate ∝ [P]3/4 [Q]1/4
What is order and molecularity of reaction?
1) Order 2, Molecularity 2
2) Order 1, Molecularity 1
3) Order 2, Molecularity 1
4) Order 1, Molecularity 2
21. The products formed at anode, cathode during electrolysis of dil. H2SO4 are
1) O2, H2O 2) O2, H2 3) H2O, O2 4) H2, O2
22. The reaction occurs at anode in Nickel - Cadmium cell is
1) NiO2(s) + 2H2O(l) + 2e-→ Ni (OH)2(l) + 2OH - (aq)
2) Cd(OH)2 (s) + 2e- → Cd(s) + 2OH- (aq)
3) Ni → Ni2+ + 2e-
4) Cd (s) + 2 OH-1 (aq) → Cd (OH)2 + 2e-
23. A standard hydrogen electrode has a zero potential because.
1) Hydrogen is the lightest element
2) The electrode potential is assumed to be zero
3) It is neither oxidized nor reduced
4) It has only one electron
24. ∆G° for the reaction Cu+2 + Fe → Fe2+ + Cu is (Given that Eo Cu2+/Cu = + 0.34 V & Eo Fe2+/Fe = − 0.45 V)
1) - 150.5 kJ 2) - 28.5 kJ 3) 180.8 kJ 4) - 28.5 kJ
25. For the disproportionation of Copper, 2Cu+→ Cu2+ + Cu, Eo is (Given that Eo Cu+/Cu = 0.53 V & Eo Cu2+/Cu = 0.15 V)
1) 0.49 V 2) - 0.19 V 3) 0.38 V 4) - 0.38 V
26. Specific conductance ..... with dilution and Molar conductance ..... with dilution.
1) Increases, Increases 2) Decreases, Decreases
3) Decreases, Increases 4) Increases, Decreases
27. A 15 ampere of current is passed through a solution of CuSO4 for 2 hours.The amount of Copper deposited at cathode is
1) 35.3 g 2) 0.587 g 3) 353 g 4) 5.87 g
28. The standard electrode potentials of 3 metals A, B, C are +1.5V, 2.5V, 0.5V respectively.
The reducing powers of metals will be
1) A > B > C 2) C > A > B 3) C > B > A 4) A > C > B
29. Limiting molar conductivity of NH4OH is equal to
30. The pressure of H2 required to make the potential of H2 electrode zero in pure water at 298 K is
1) 10-10 atm 2) 10-4 atm 3) 10-12 atm 4) 10-14 atm
31. If standard cell potential of a galvanic cell at a given temperature has a negative value, which of the following gives the correct relationships for the values of ∆Go & Keq.
1) ∆Go < 0, Keq < 0 2) ∆Go > 0, Keq > 0
3) ∆Go > 0, Keq < 0 4) ∆Go< 0, Keq > 0
32. The molar conductance of 0.2 M solution of HCl with electrolytic conductivity of 5.76 × 10-4 Scm-1 at 298 K is
1) 11.52 Scm2 mol-1 2) 2.88 Scm2 mol-1
3) 28.8 Scm2 mol-1 4) 115.2 Scm2 mol-1
33. The number of electrons delivered at the cathode during electrolysis by a current of 2 amp in 2 minutes is (charge on electron 1.609 × 10-19 c)
1) 1.5 × 1019 2) 1.50 × 1021 3) 1.75 × 1021 4) 1.75 × 1019
34. In galvanic cell, electrons flows from
1) Anode to Cathode 2) Cathode to Anode
3) No transfer of electrons 4) None
35. The molar conductance of M/32 solution of a weak mono basic acid is 16.0 ohm-1 cm2 mol-1 and at infinite dilution is 800 ohm-1cm2 mol-1.
The dissociation constant of this acid is
1) 1.25 × 10-4 2) 12.5 × 10-4 3) 1.25 × 10-5 4) 125 × 10-6
36. The overall reaction of a H2 - O2 fuel cell is
1) 2H2 (g) + O2 (g) → 2 H2O (l)
2) 2H2 (g) + 4OH- (g) → 4H2O (l) + 4e-
3) O2(g) + 2H2O (l) + 4e-→ 4OH- (aq)
4) 4OH- (aq) + 4e-→ 2H2O (l)
37. Mark the correct choice of electrolytes represented in the graph
1) I : HCl II : KCl
2) I : NH4OH II : KCl
3) I : KCl II : NH4OH
4) I : KCl II : HCl
38. When a lead storage battery is discharged
1) Lead sulphate is consumed 2) Oxygen is evolved
3) Lead sulphate is formed 4) All
ANSWERS: 1-3; 2-2; 3-3; 4-4; 5-3; 6-4; 7-1; 8-2; 9-1; 10-3; 11-4; 12-2; 13-4; 14-2; 15-4; 16-2; 17-4; 18-3; 19-3; 20-4; 21-2; 22-4; 23-2; 24-1; 25-3; 26-3; 27-1; 28-2; 29-2; 30-4; 31-3; 32-2; 33-2; 34-1; 35-3; 36-1; 37-2; 38-3.
