Question

Which of the following statements is not
true for all acids?
They liberate carbon dioxide gas
when reacted with sodium
carbonate.
о O
They liberate hydrogen gas when
reacted with magnesium ribbon.
They react with copper (II) oxide
to produce a blue solution.
O
They produce hydrogen molecules
when dissolved in water.​

Answer 1

Answer:

It's the first statement which is false

EXPLANATION:

2nd is true because if u take mg + Hcl ---- mgCl2 + H2

3rd is true because when we dissolve acid in water it releases H+ ion which further react with water to form hydronium ion H3O+ ion

Answer 2

The incorrect statement is that all acids produce hydrogen molecules when dissolved in water.

• All the acids, when reacted with sodium  carbonate (Na₂CO₃), liberate carbon dioxide (CO₂).
• All the acids, when reacted with copper oxide (CuO), produce a blue color solution.
• All the acids, when reacted with magnesium ribbon to liberate hydrogen gas.

Hence, the correct option is d) They produce hydrogen molecules  when dissolved in water.​