Question

you are given the following materials: (1)marble chips
(2)zinc granules
(3)dilute hydrochloric acid
identify type of reaction when marble chips and zinc granules are added separately to acid taken in two test tubes

Answer 1

Hydrogen is formed
Hope this helps

Answer 2

1) Marble chips(made of Calcium carbonate) react with hydrochloric acid to make Calcium chloride, Water and Carbon dioxide.

Calcium Carbonate + Hydrochloric acid - - - - ->


Calcium chloride + Water + Carbon Dioxide



2) Zn  +  2HCl     gives   ZnCl2  +   H2

That is when zinc react with Hydrochloric acid zinc chloride and hydrogen gas is formed


Hope it helps you...........!!