A gas is evolved when a piece of zinc metal is placed in dilute sulphuric acid (H2S04). What is the gas?

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Q: 82 (NDA-II/2013)
A gas is evolved when a piece of zinc metal is placed in dilute sulphuric acid (H2S04). What is the gas?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,29,13,29,3,2,8

keywords: 

{'zinc metal': [0, 0, 0, 1], 'sulphur dioxide': [0, 0, 0, 1], 'gas': [9, 1, 9, 27], 'hydrogen': [0, 0, 1, 3], 'sulphuric acid': [1, 1, 0, 1], 'oxygen': [3, 0, 1, 0], 'h2s04': [0, 0, 0, 2], 'water vapour': [0, 0, 1, 2]}

When a piece of zinc metal is placed in dilute sulphuric acid (H2S04), a gas is evolved. The correct gas in this reaction is option 1: Hydrogen.

It is important to understand the chemical reaction happening here. Zinc reacts with sulphuric acid to produce zinc sulphate and hydrogen gas. The chemical equation for this reaction can be represented as:

Zn + H2SO4 [REPLACEMENT] ZnSO4 + H2

In this reaction, zinc (Zn) reacts with sulphuric acid (H2SO4) to form zinc sulphate (ZnSO4) and hydrogen gas (H2). So, the gas evolved in this reaction is hydrogen.

Hydrogen gas is a colorless, odorless, and highly flammable gas. It is lighter than air and has several uses in various industries, such as in the production of ammonia, as a fuel for rockets, and in hydrogen fuel cells for generating electricity.

Therefore, the correct answer to the question is option 1: Hydrogen.