35. Which of the following ions would be useful in the removal of \(\text{Fe}^{3+}\) from water?

(A)\(\text{OH}^-\)

(B)\(\text{Cl}^-\)

(C)\([\text{SO}_4]^{2-}\)

(D)\([\text{NO}_3]^-\)

36. Which of the following electron configurations is inconsistent with Hund's rule of maximum multiplicity?(A)\(1s^2 2s^2 2p_x^1 2p_y^1 2p_z^1\)(B)\(1s^2 2s^2 2p_x^2 2p_y^2 2p_z^2\)(C)\(1s^2 2s^2 2p_x^2 2p_y^1 2p_z^1\)(D)\(1s^2 2s^2 2p_x^2 2p_y^1 2p_z^0\)

37. The \(\text{NO}_2^-\) ion forms linkage isomers in which either the nitrogen or the oxygen is bound to a transition metal. Which of the following ligands can also form linkage isomers?(A)\(\text{CO}_2\)(B)\(\text{SCN}^-\)(C)\(\text{OH}^-\)(D)\(\text{CO}_3^{2-}\)

38. Which one is NOT colligative property (which depends on concentration rather than the identity of the molecules)?(A)Freezing point depression(B)Boiling point elevation(C)Osmotic pressure(D)Capillary rise

39. Chlorine exists naturally as a mixture of chlorine-35 and chlorine-37 isotopes. An atom of chlorine-35 contains(A)17 protons, 18 neutrons, 17 electrons.(B)16 protons and 17 electrons, only.(C)18 protons, 18 electrons, and 17 neutrons.(D)17 protons, 35 neutrons, and 17 electrons.

40. Which of the following combinations of quantum numbers is NOT allowed?(A)\((n,l,m_l,m_s) = (4,3,-2,\frac{1}{2})\)(B)\((n,l,m_l,m_s) = (3,1,0,-\frac{1}{2})\)(C)\((n,l,m_l,m_s) = (1,1,0,\frac{1}{2})\)(D)\((n,l,m_l,m_s) = (5,2,0,-\frac{1}{2})\)

1. How many protons, neutrons, and electrons does \(^{56}\text{Fe}\) have? (A)26 protons, 26 neutrons, 30 electrons (B)26 protons, 24 neutrons, 56 electrons (C)30 protons, 26 neutrons, 26 electrons (D)26 protons, 30 neutrons, 26 electrons (E)56 protons, 26 neutrons, 56 electrons

2. Which formula is not correct? (A)Na₂O (B)K₃PO₄ (C)HCN (D)SrCl₂ (E)Al₂O₃

3. What is the molar mass of ethanol (C₂H₅OH)? (A)45.07 (B)38.90 (C)46.07 (D)34.17 (E)62.07

4. To calculate the concentration in molarity of a salt solution, you need to know (A)The mass of the salt added and the volume of water added to the solution. (B)The mass of the salt added to the solution and the total volume of the solution. (C)The mass of the salt added, the molar mass of the salt, the volume of water added to the solution. (D)The molar mass of the salt and the total volume of the solution. (E)The mass of the salt added, the molar mass of the salt, the volume of water added, and the total volume of the solution.

5. An aqueous solution of silver nitrate is added to an aqueous solution of potassium chromate and this reaction produces a solid. What is the formula for the solid? (A)AgK (B)AgCrO₄ (C)KNO₃ (D)K₂NO₃ (E)Ag₂CrO₄

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