Question

What happens; When dilute 'HCl' is added to granulated 'Zn' ?

• A. 'H$_2$' gas and 'ZnCl$_2$' are Produced
• B. No Reaction Produced
• C. 'H$_2$O' and 'ZnO' are Produced
• D. H$_2$O and ZnSO$_4$ are Produced

Hint:

Remember the general rule for reactive metals and dilute acids: Metal + Acid $\rightarrow$ Salt + Hydrogen gas. This is a fundamental type of displacement reaction.

Answer 1

The Correct Option is A

Step 1: Identify the reactants.
The reactants are dilute hydrochloric acid (HCl) and granulated zinc (Zn). Zinc is a metal, and hydrochloric acid is a strong acid. Step 2: Recall the reaction of metals with acids.
When a reactive metal reacts with a dilute acid, it typically displaces hydrogen from the acid to form a salt and hydrogen gas. The reactivity series of metals helps determine if a metal will react with an acid. Zinc is more reactive than hydrogen, so it will displace hydrogen from HCl. Step 3: Write the chemical reaction.
The reaction between zinc and hydrochloric acid is a single displacement reaction: Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl$_2$(aq) + H$_2$(g)
Zinc (Zn) reacts with hydrochloric acid (HCl).
Zinc chloride (ZnCl$_2$) is formed as the salt.
Hydrogen gas (H$_2$) is released. Step 4: Evaluate the given options.
(1) 'H$_2$' gas and 'ZnCl$_2$' are Produced: This matches the predicted products of the reaction.
(2) No Reaction Produced: This is incorrect as zinc is more reactive than hydrogen.
(3) 'H$_2$O' and 'ZnO' are Produced: This is incorrect. ZnO would be produced if zinc reacted with oxygen, and H$_2$O is not a primary product of this type of displacement reaction.
(4) H$_2$O and ZnSO$_4$ are Produced: This is incorrect. ZnSO$_4$ (zinc sulfate) would be formed if zinc reacted with sulfuric acid, not hydrochloric acid. Step 5: Conclude the correct products.
When dilute HCl is added to granulated Zn, hydrogen gas and zinc chloride are produced. $$(1) 'H$_2$' gas and 'ZnCl$_2$' are Produced$$