Question

Which of the following properties are shown by dilute HCI?
(1) It turns blue litmus red
(2) It turns red litmus blue
(3) It reacts with zinc and a gas is evolved
(4) li reacts with solid sodium carbonate to give brisk effervescence
(a) I and 2 (b) I and 3 (c) 1, 3 and 4 (d) 2, 3 and 4​

Answer 1

Answer:

B

Explanation:

As you know the Dil Hcl is an acid changes Blue to Red colour of the litmus paper due to the presence of more H+ ions and conducts electricity.

When Zinc reacts Hydrochloric acid it liberates Hydrogen gas and forms Zinc chloride. Because Zinc is more reactive thanthe Hydrogen. So the Zinc displaces less reactive element Hydrogen from the chlorine . So you can understand that more reactive displaces less reactive element in a compound.