Please answer the question 16. The pll of 0.01 M NaOH solution is b) 2 c) 4 d) 1

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Please answer the question

16. The pll of 0.01 M NaOH solution is b) 2 c) 4 d) 12 e) None 17. A certain first-order reaction has a halflife of 40 min. The rate constant for this reaction 3.47 x 103 4,82x 102 si 1.73 x 10' s 2.88x 104 s e- None 18. For the equilibrium system: +198 kJ Which of the following changes will increase the amount of AB at equilibrium? a) Lowering the temperature. b) Increasing the container volume. c) Increasing the temperature. d) Adding an inert gas. e) None. 19. A 0.2 gram of a gas (Mwt 20 g/mol) were held in 2 L container at 17 "C. The pressure of the gas is:(R 0.0821 atm.L/mol.K) a) 0.01 atm b) 0.24 atm c) 0.12 atm d) 0.08 atm e) None 20. To have an efficient iron corrosion protection, we make: a) Plating with copper. b) Plating with zinc. c) Painting with any paint. None 21. The pH of a 2.5 x 10 M HCI solution is: a) 2.50 b) 1.60 c) 3.23 d) 1.30 22. At equilibrium it is correct to say that: a) The reaction has similar rates in both b) Reaction quotient equals equilibrium c) Gibbs free energy is zero. (a), (b) and (c). e) None. 23, Combustion of fossil fuel produces con. which leads to of rain water c) pH

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16-d)12

17 - d)2.88*10^-4

18 - c) increasing the temperature

19-c)0.12 atm

20-d) all the options a b and c are correct

21-b)1.60

22-d) all the options a b and c are correct

23 - c) pH < 7

24 - a) ideal

25 - b) 1 mg (solute) / L (solvent)

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