A) \[\frac{9}{4}\]
B) \[\frac{4}{9}\]
C) \[\frac{8}{5}\]
D) \[\frac{5}{8}\]
Correct Answer: C
Solution :
From given curve, Melting point for \[A=60{}^\circ C\] and melting point for \[B=20{}^\circ C\] Time taken by A for fusion \[=(6-2)=4\] minute Time taken by B for fusion \[=(6.5-4)=2.5\] minute Then \[\frac{{{H}_{A}}}{{{H}_{B}}}=\frac{6\times 4\times 60}{6\times 2.5\times 60}=\frac{8}{5}\].
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