States of Matter
Graham law relates:
A) Rate and molar mass
B) Colour and mass
C) Volume and colour
D) Pressure and colour
Liquefaction of gases needs:
A) Low T and high P
B) High T only
C) Low P only
D) Vacuum only
Critical temperature is:
A) Above which gas cannot liquefy by P alone
B) Boiling point
C) Freezing point
D) Room temp
Evaporation occurs at:
A) Surface at any temperature
B) Only boiling point
C) Only 0 K
D) Only solids
Boiling occurs when:
A) Vapour pressure equals atmospheric
B) Surface only
C) Only in vacuum
D) Never in liquids
Vapour pressure increases with:
A) Temperature
B) Decreasing T
C) Pressure only
D) Volume only
Heating curve plateau at melting:
A) Latent heat of fusion
B) Kinetic only
C) No energy
D) Ionization
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