In the oil wells, X forms the topmost layer

CHEMISTRY · Single correct · GCSE · Chemistry · Organic Chemistry · Organic Chemistry

Problem

In the oil wells, X forms the topmost layer, followed by Y and finally Z. X, Y and Z are respectively (a) Natural gas, oil and water (b) Petroleum gas, oil and natural gas (c) Natural gas, water and oil (d) Petroleum gas, oil and water

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