Chapter: Origin and Evolution of Life· Biology

Write the ratio of methane, ammonia and hydrogen respectively in Urey and Miller’s experiment.

Q.2 (i) Write the ratio of methane, ammonia and hydrogen respectively in Urey and Miller’s experiment.

Doubtly Asked 29 Oct 2026 Board exam · July 2024 hsc 12th Save WhatsApp Report

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Answer: 2 : 1 : 2

In their 1953 experiment, Urey and Miller filled the apparatus with methane (CH₄), ammonia (NH₃) and hydrogen (H₂) in the ratio 2 : 1 : 2, along with water vapour, and passed electric sparks through the mixture. Simple organic compounds such as amino acids were formed, supporting the chemical origin of life.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

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Write the ratio of methane, ammonia and hydrogen respectively in Urey and Miller’s experiment.

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