Respuesta :
Answer: 1. Option (b) is the correct answer.
2. Option (b) is the correct answer.
Explanation:
1. The reaction between the given reactants will be as follows.
(a) [tex]Fe(OH)_{3} + CuO \rightarrow Fe_{2}O_{3} + Cu(OH)_{2}[/tex]
(b) [tex]Cu(OH)_{2} + H_{2}S \rightarrow CuS + H_{2}O[/tex]
(c) [tex]MgO + Ca(OH)_{2} \rightarrow Mg(OH)_{2} + CaO[/tex]
(d) [tex]SO_{3} + H_{2}O \rightarrow H_{2}SO_{4}[/tex]
Thus, out of the given options, the reaction [tex]Cu(OH)_{2} + H_{2}S \rightarrow CuS + H_{2}O[/tex] results in the formation of water.
2. Base on reactivity series, the reactivity of some metals in the decreasing order is as follows.
K, Na, Ca, Mg, Al, Zn, Fe
Whereas B is a metalloid so, it will have properties of both metals and non-metals. Thus, boron (B) will also be less reactive than Al.
Therefore, out of the given options, Ca is more reactive than Zn and Fe.
