Question

Which one of the following is Characteristic of an acid? (A). React with some metals to produce hydrogen gas. (B) Turn phenolphthalein pink (C). Turn red litmus blue (D). Feel slippery

Answer 1

`A`

Step-by-step explanation:

Here, we want to select which of the options represent the property of an acid

An acid like hydrochloric acid reacts with metallic elements (for example, group 2 elements) like magnesium to produce hydrogen gas and the corresponding metallic salt

We can see that as follows:

`Mg_((s))+2HCl_((aq))\text{ }\rightarrow MgCl_(2(aq))+H_(2(g))`

Thus,the correct option here is that A mineral acid react with some metals to produce hydrogen gas