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)

Question

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) (A) A , B , C , D (B) B , C only (C) C, D only (D) A, C only

Tardigrade Admin · Accepted Answer

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)

C a (s) + 2 H_{2} O (l) ⟶ C a (O H)_{2} (a q) + H_{2} (g)

(C)

2 F e (s) + 3 H_{2} O (l) ⟶ Δ F e_{2} O_{3} (s) + 3 H_{2} (g)

$A, B, C, D$

$B, C$ only

$C$ , D only

$A$ , $C$ only

Q. Which of the following are non-metal displacement reactions? (A) Ca(s)+2H2​O(l)⟶Ca(OH)2​(aq)+H2​(g) (B) V2​O5​(s)+5Ca(s)⟶Δ​2V(s)+5CaO(s) (C) 2Fe(s)+3H2​O(l)⟶Δ​Fe2​O3​(s)+3H2​(g) (D) Cr2​O3​(s)+2Al(s)⟶Δ​Al2​O3​(s)+2Cr(s)

A,B,C,D

B,C only

C, D only

A, C only

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)+2H2​O(l)⟶Ca(OH)2​(aq)+H2​(g) (C) 2Fe(s)+3H2​O(l)⟶Δ​Fe2​O3​(s)+3H2​(g)

$A, B, C, D$

$B, C$ only

$C$ , D only

$A$ , $C$ only