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JAMB Chemistry 2024 Paper

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Question : 73

Total: 138

An example of a substance that does not change directly from solid to gas when heated is

NH $_4$ Cl $(_s$ )
I $_2$ $(_s$ )
CaCO $_3$ $(_s$ )
S $_8$ $(_s$ )

Solution:

NH $_4$ Cl, I $_2$ , S $_8$ all undergo sublimation. i.e changes from solid to gaseous substances without first changing to liquid, when heated but CaCO $_3$ does not.

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