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  2. Question
  3. Chemistry
  4. Which of the following are non-metal displacement reactions? (A) Ca (s)+2 H 2 O (l) longrightarrow Ca ( OH )2(a q)+ H 2(g) (B) V 2 O 5(s)+5 Ca (s) stackrelΔ longrightarrow 2 V (s)+5 CaO (s) (C) 2 Fe (s)+3 H 2 O (l) stackrelΔ longrightarrow Fe 2 O 3(s)+3 H 2(g) (D) Cr 2 O 3(s)+2 Al (s) stackrelΔ longrightarrow Al 2 O 3(s)+2 Cr(s)

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Q. Which of the following are non-metal displacement reactions?
(A) $Ca (s)+2 H _{2} O (l) \longrightarrow Ca ( OH )_{2}(a q)+ H _{2}(g)$
(B) $V _{2} O _{5}(s)+5 Ca (s) \stackrel{\Delta}{\longrightarrow } 2 V (s)+5 CaO (s)$
(C) $2 Fe (s)+3 H _{2} O (l) \stackrel{\Delta}{\longrightarrow } Fe _{2} O _{3}(s)+3 H _{2}(g)$
(D) $Cr _{2} O _{3}(s)+2 Al (s) \stackrel{\Delta}{\longrightarrow } Al _{2} O _{3}(s)+2 Cr(s)$

AP EAMCETAP EAMCET 2019

Solution:

Reactions given in options (A) and (C) are hydrolysis reaction and not metal displacement reactions as in these cases there is only one metal present in the reaction.

(A) $Ca (s)+2 H _{2} O (l) \longrightarrow Ca ( OH )_{2}(a q)+ H _{2}(g)$

(C) $2 Fe (s)+3 H _{2} O (l) \stackrel{\Delta}{\longrightarrow } Fe _{2} O _{3}(s)+3 H _{2}(g)$