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hardQ. No. 11052-which-gas-is-liberated-when-dilute-hydrochloric-acid-reacts-with-zinc-metal

Which gas is liberated when dilute hydrochloric acid reacts with zinc metal?

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Built around the concept in “Which gas is liberated when dilute hydrochloric acid reacts with zinc metal?”, this bilingual General Science item checks whether a learner can connect a scientific term with its exact property, mechanism or function. The verified answer is Hydrogen.

AChlorine
BNitrogen
COxygen
DHydrogen
Correct Answer: HydrogenYour Answer: D

Explanation

Option D, Hydrogen, matches the evidence in the stem. Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas. A common name, formula, acid-base character or periodic position provides a stronger basis than superficial similarity between substances. The alternatives Chlorine, Nitrogen and Oxygen are legitimate scientific terms, but each belongs to a different function, property, material or context.

Important Notes

  • Verified answer: Hydrogen; option D, zero-based index
  • Core scientific fact: Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas.
  • Distractors Chlorine, Nitrogen, Oxygen represent different scientific associations.
  • Revision pair: “Which gas is liberated when dilute hydrochloric acid reacts with zinc metal? — Hydrogen”.

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Common questions and clear answers for this topic.

Which gas is liberated when dilute hydrochloric acid reacts with zinc metal?

Hydrogen. Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas.

Which concept should be used to solve this item?

Use the defining property and mechanism from chemistry.

Why are the other options unsuitable?

Chlorine, Nitrogen, Oxygen belong to different functions, properties or contexts.

How should this fact be revised?

Connect “Which gas is liberated when dilute hydrochloric acid reacts with zinc metal?” with Hydrogen and the supporting mechanism.

What is General Science and which topics are important for competitive exams?

General Science covers basic concepts in Physics, Chemistry, Biology, and Earth Science. It is an important section in competitive exams like SSC CGL, UPSC Prelims, Railway NTPC, and Defence exams. Questions include scientific laws, inventions, human body systems, chemical reactions, and everyday science phenomena. NCERT Science books from Class 6 to 10 are recommended.

What are Newton's Laws of Motion?

Newton's Three Laws of Motion: 1) First Law (Law of Inertia) - An object remains at rest or in uniform motion unless acted upon by an external force. 2) Second Law - Force equals mass times acceleration (F=ma). 3) Third Law - For every action there is an equal and opposite reaction. These laws are fundamental to Physics and frequently asked in SSC CGL, Railway, and NDA exams.

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