Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which gas is released when metal reacts with dilute hydrochloric acid?
Oxygen
Chlorine
Hydrogen
Nitrogen
Hydrogen
When a reactive metal reacts with dilute hydrochloric acid, it displaces hydrogen from the acid to form a metal chloride and releases hydrogen gas. This is a characteristic property of active metals lying above hydrogen in the reactivity series.
When a reactive metal reacts with dilute hydrochloric acid, it displaces hydrogen from the acid to form a metal chloride and releases hydrogen gas. This is a characteristic property of active metals lying above hydrogen in the reactivity series.
Think of an active person cutting into a pairing, taking one partner (chloride) and leaving the other person (hydrogen) out to wander off on their own.
Metal+2HCl┬а(dil.)\to Metal┬аChloride+H_2 \uparrow$ тАФ General reaction of metal with dilute hydrochloric acid
Zn+2HCl\to ZnCl_2 + H_2 \uparrow$ тАФ Example with Zinc metal
This process is a single displacement reaction where the metal acts as a reducing agent, donating electrons to hydrogen ions (H+)present in the acid. The hydrogen ions are reduced to form neutral hydrogen gas (H_2), which evolves as bubbles.
Only metals placed above hydrogen in the reactivity series react with dilute acids to evolve hydrogen gas.
Copper, silver, and gold do not react with dilute hydrochloric acid because they are less reactive than hydrogen.
Laboratory preparation of hydrogen gas
Testing for the presence of active metals
Hydrogen gas burns with a characteristic pop sound when a burning matchstick or splinter is brought near it.
Options A, B, and D are incorrect because oxygen, chlorine, and nitrogen are not evolved in this standard single displacement acid-metal reaction.
C is correct тАФ Hydrogen gas is released when a reactive metal reacts with dilute hydrochloric acid.
Remember that unreactive noble metals like gold and platinum do not react with dilute acids to release hydrogen gas.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants