Magnesium ribbon was allowed to burn inside a given gas P...
Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?
nitrogen
chlorine
oxygen
sulphur (IV) oxide
Correct answer is A
No explanation has been provided for this answer.
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