Question

E temperature of the reaction mixture rises when aluminium (al) is added

Answer 1

Answer:

Explanation:

A) silver bring a less reactive metal than hydrogen does not displace hydrogen from HCL hence it does not react with dilute HCL

B) it is a exothermic reaction  

C) it is an exothermic reaction  

D) when lead is treated with hydrochloric acid bubbles of hydrogen gas are evolved  

Pb+2Hcl--------- pbcl2 +H2