Given below are two statements :
Statement-I : Sublimation is used for the separation and purification of compounds with low melting point.
Statement-II : The boiling point of a liquid increases as the external pressure is reduced.
In the light of the above statements, choose the correct answer from the options given below :
- A
Statement-I is false but Statement-II is true.
- B
Statement-I is true but Statement-II is false.
- C
Both Statement-I and Statement-II are true.
- D
Both Statement-I and Statement-II are false.
Statement-I: Sublimation separates compounds that sublime (solid → vapour without melting) from non-sublimable impurities. Low melting point is irrelevant; many substances with low MP do not sublime. False.
Statement-II: Boiling occurs when vapour pressure equals external pressure. Reducing the external pressure means a lower vapour pressure suffices, so boiling occurs at a lower temperature. False.
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