14. When the position of an oscillating particle is x = Acoswt , , its velocity v is
(A) A cos wt
(B) -A cos wt
(C) -Aw sin wt
(D) Aw sin wt

15. A 5 kg piece of lead (specific heat 0.03 cal/g C°) having a temperature of 80° C is added to 500 g of water having a temperature of 20°. What is the final equilibrium temperature in °C of the system? (A) 79 (B) 26 (C) 54 (D) 34

16. At every instant, the ratio associated with an electromagnetic wave is equal to (A) (B) (C) H (D) c

17. An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. What wavelength in nm is needed if a photon accomplishes this task? (A) 60 (B) 80 (C) 70 (D) 90

18. Which form of electromagnetic radiation has the longest wavelengths? (A) gamma rays (B) microwaves (C) radio waves (D) x-rays

19. Which of the following statements is incorrect? (A) Ionic bonding results from the transfer of electrons from one atom to another. (B) Dipole moments result from the unequal distribution of electrons in a molecule. (C) The electrons in a polar bond are found nearer to the more electronegative element. (D) Linear molecules cannot have a net dipole moment.

20. Which of the following statements is true? (A) When two opposing processes are proceeding at identical rates, the system is at equilibrium. (B) Catalysts are an effective means of changing the position of an equilibrium. (C) The concentration of the products equals that of reactants and is constant at equilibrium. (D) An endothermic reaction shifts toward reactants when heat is added to the reaction.

21. The reaction N2(g) + 3H2(g) 2NH3(g) takes place in a 1.0-L vessel initially filled with an equimolar mixture of N2 and H2 at a pressure of 12.0 atm. When equilibrium is reached, the partial pressure of H2 is 3.0 atm. Determine the value of Kp for this reaction. (A) 0.915 (B) 0.333 (C) 0.133 (D) 0.030

22. If an acid, HA, is 10.0% dissociated in a 1.0 M solution, what is the Ka for this acid? (A) 9.1 x 10–2 (B) 1.1 x 10–2 (C) 8.1 x 10–1 (D) 6.3 x 10–2

23. Calculate the pH of a 0.02 M solution of KOH. (A) 1.7 (B) 2.0 (C) 12.0 (D) 12.3

24. Which of the following will not produce a buffered solution? (A)100 mL of 0.1 M Na2CO3 and 50 mL of 0.1 M HCl (B)100 mL of 0.1 M NaHCO3 and 25 mL of 0.2 M HCl (C)100 mL of 0.1 M Na2CO3 and 75 mL of 0.2 M HCl (D)100 mL of 0.1 M Na2CO3 and 50 mL of 0.1 M NaOH

115年 - 115 新北市立國民中學_教師聯合甄選試題：理化科#140273

114年 - 114 中區縣市政府教師甄選策略聯盟試題：國中理化#139077

114年 - 114 高雄市市立國民中學教師聯合甄選：理化#129022

114年 - 114-2 新竹市國民中學教師聯合甄選初試試題：理化科#128192

114年 - 114 臺南市市立國民中學_正式教師聯合甄選試題：理化專門科目#128068

114年 - 114 桃園市國民中學新進教師聯合甄選試題：理化科#127855

114年 - 114 臺北市市立國民中學_正式教師聯合甄選試題：理化科#127441

114年 - 114 新北市立國民中學_教師聯合甄選試題：資優理化科#127356

114年 - 114 新北市立國民中學_教師聯合甄選試題：理化科#127217

114年 - 114 國立嘉科實驗高級中學_國中部教師甄選試題：理化科#126863