On adding dilute sulphuric acid to a test tube containing a metal X, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal X?
The correct option is (b) Zinc. When dilute sulphuric acid reacts with zinc, it releases hydrogen gas. This colourless gas burns with a pop sound when a burning matchstick is brought near, confirming the presence of hydrogen.
Class 10 Science Sample Paper for half yearly Exam 2025-26
Half Yearly Exam Sample Paper 2025-26
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The correct answer is (b) Zinc. When dilute sulphuric acid reacts with zinc metal, hydrogen gas is released. The reaction is:
Zn + H₂SO₄ → ZnSO₄ + H₂↑.
Hydrogen is a colourless gas that burns with a ‘pop’ sound when a burning matchstick is brought near it. Hence, metal X is zinc.