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A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube,...

Chemistry
JAMB 1978

A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone?

  • A. distillation
  • B. sublimation
  • C. precipitation
  • D. evaporation
  • E. decomposition
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Correct Answer: Option B
Explanation

Sublimation is the transition of a substance directly from the solid phase to the gas phase without passing through the intermediate liquid phase 


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709