Question

You are given the following substances with their melting and bowling points. Identify the physical status of X, Y and Z at room temperature (30°C).
Substance Melting point(°C) Boiling point(°C)
X -219 -183
Y 119 445
Z -15 78

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Answer

‘X’ is gas at room temperature.
‘Y’ is solid at room temperature.
‘Z’ is liquid at room temperature.

 

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