Question

Observe the rate of evolution of hydrogen gas with five metals P, Q, R, S and T at room temperature. What could be the metals P, Q, R, S and T?

Answer 1

Correct option  (B) 

Explanation:

 ln reactivity series, the order of reactivity of given metals is as follows :

Mg>Al>Zn>Fe>Cu

Thus, rate of evolution of H₂ gas in case of Mg is maximum followed by Al, Zn and then Fe. Cu does not react with dil.HCl, so no evolution of H₂ gas is observed.