66ᵗʰ B.P.S.C. (Re-Exam) (Pre) 2020
Which of the following has highest melting point?
aBoron✓ Correct
bIron
cSilicon
dAluminium
eNone of the above/More than one of the above
Explanation
The melting point of a solid substance is the temperature at which it changes from the solid state to the liquid state. At the melting point, the solid and liquid phases remain in equilibrium. The melting point of boron is 2350 K, aluminium is 933.473 K, silicon is 1687 K, and iron is 1811 K. Hence, boron has the highest melting point.
general-geography