15. Based on the following single replacement reaction, what would be the productin I_(2)+MnOarrow A. MnI_(2) and O B. MnI and O_(2) C. MnI_(2) and O_(2) D. MnI and O 16. Which type of reaction is the following: KI+Fr_(2)Sarrow A. Double Replacement B. Single Replacement C. Combustion D. Synthesis 7. Which of the following reactions is NOT a single replacement reacti A Zn+AgClarrow ZnCl_(2)+Ag B C_(2)H_(6)+O_(2)arrow CO_(2)+H_(2)O C Cl_(2)+CuBr_(2)arrow CuCl_(2)+Br_(2) D Au+FeF_(3)arrow Fe+AuF_(3) Based on the following double replacement reaction , which pr Ba(NO_(3))_(2)+Na_(2)SO_(4)arrow A. Ba(NO_(3))_(2) B. Na_(2)SO_(4) C. BaSO_(4) D. NaNO_(3) Which of the following metals is the most reactive? A. Sn B. Fe C. Mg D. C.

15. The correct answer is C. $MnI_{2}$ and $O_{2}$.<br /><br />In the given single replacement reaction, iodine (I2) reacts with manganese(II) oxide (MnO) to produce manganese(II) iodide (MnI2) and oxygen (O2). This is a single replacement reaction where iodine replaces the oxygen in manganese(II) oxide.<br /><br />16. The correct answer is B. Single Replacement.<br /><br />In the given reaction, potassium iodide (KI) reacts with iron(II) sulfide (Fe2S) to produce potassium sulfide (K2S) and iron(II) iodide (FeI2). This is a single replacement reaction where iron replaces the potassium in potassium iodide.<br /><br />17. The correct answer is B. $C_{2}H_{6}+O_{2}\rightarrow CO_{2}+H_{2}O$.<br /><br />This reaction is a combustion reaction, not a single replacement reaction. In a combustion reaction, a hydrocarbon (in this case, ethane, C2H6) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).<br /><br />18. The correct answer is C. $BaSO_{4}$.<br /><br />In the given double replacement reaction, barium nitrate (Ba(NO3)2) reacts with sodium sulfate (Na2SO4) to produce barium sulfate (BaSO4) and sodium nitrate (NaNO3). Barium sulfate (BaSO4) is the precipitate formed in this reaction.<br /><br />19. The correct answer is C. Mg.<br /><br />Among the given options, magnesium (Mg) is the most reactive metal. The reactivity series of metals is as follows: K > Ba > Ca > Na > Mg > Al > Zn > Fe > Ni > Sn > Pb > H > Cu > Hg > Ag > Pt. Therefore, magnesium is more reactive than tin (Sn), iron (Fe), and copper (Cu).