Question

P, Q and R are 3 elements which undergo chemical reactions according to the following equations - 

(a) P₂O₃ + 2Q → Q₂O₃ + 2P

(b) 3RSO₄ + 2Q → Q₂ (SO₄)₃ + 3R

(c) 3RO + 2P → P₂O₃ + 3R

Answer the following :

(i) Which element is more reactive?

(ii) Which element is least reactive?

(iii) State the type of reaction listed above.

Answer 1

(i) Most reactive metal is Q as it has replaced both P and R from their compounds.

(ii) Element R is least reactive as it has been replaced by both R and Q.

(iii) Displacement reaction.