53. Use ionization 44. The ground state electron configuration of atomic Ge is w

Question

53. Use ionization 44. The ground state electron configuration of atomic Ge is which is stron (A) HIO3 (B) HC2H (C) HCN (D) HNO (B) [Ar)4s24p2 (D) [Ar]4s23d12 (A) (Ar)4s24d104p (C) (Ar)43d1e4p2 Which statement is true for this reaction? Fe+CuSO4 Cu + FeSO4 (A) Cu2 is reduced. (C) SO2-is reduced. (D) Fe is reduced (B) Cu is oxidized. 54. When solutio are mixed.a (A) sodium (C) barium 46. Which gas will diffuse most rapidly? (A) CO2 (B) Cl2 C) H2S (D) SO2 47. 55. Use equilibe slightly sol (A) Pbn (B) AgC (C) CuS Ruthenium oxide is Ru2O, and potassium permanganate is KMnO4. The formula for ruthenium permanganate is (A) RujMnO (B) Ru(MnO) (D) Ru2(Mnods (C) Ru(MnOah Which compound contains both ionic and covalent bonds? (A) 02 (B) NaSe (C) N20 (D) Na3PO4 48. (D) CaC 56. If the pH (A) 8.75 (C) 14. 49. If 37.20 mL of 0.1200 M NaOH are required to reach a phenolphthalein endpoint in the titration of a 25.00 mL sample of HCI, the concentration of the HCI is (A) 0.1200 M (B) 0.08065 M (D) 0.1526 M (C) 0.1786 M 57· The dete acid rain 5 When coal burns with a limited oxygen supply, it roduces carbon monoxide (Reaction 1). If, however, an (A) cal (B) lin (C) ca (D) co 58. The pH (A) le (C) I excess of oxygen is available, the carbon combustion product is CO2 (Reaction 2). Which statement is true? (A) Reaction 2 is more exothermic than Reaction 1 (B) Reaction 1 is endothermic and Reaction 2 is exothermic. (C) Both reactions are endothermic (D) Hess's law predicts that both reactions will yield the same energy. 51. A catalyst may speed up a chemical reaction by (A) decreasing the energy of the products. (B) increasing the eneroy of tcnts 59. Tc-99 isotope emissi radiole

Explanation / Answer

44) Atomic number of Ge = 32

So, ground state electronic configuration of Ge = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2

Or, [Ar] 4s2 3d10 4p2

So, option C is the correct choice.

45) The species which gains electrons is said to be reduced

and species which loose electrons is said to be oxidised.

In this reaction, Fe is oxidised from Fe to Fe2+ and Cu is reduced from Cu+2 to Cu.

So, option A is the correct choice.

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