Chemistry - Complete Pblock- Question with Solution | TestHub
Given below are two statements : one is labelled as Assertionand the other is labelled as Reason.
Assertion (A): Melting point of Boronis unusually high in groupelements.
Reason (R): Solid Boron has very strong crystalline lattice.
In the light of the above statements, choose the most appropriate answer from the options given below ;
Options:
Answer:
Solution:
Boron is non-metallic in nature. It is extremely hard and black coloured solid. Due to a very strong crystalline lattice, boron has an unusually high melting point. The rest of the members are soft metals with a low melting point and high electrical conductivity.
Hence, Solid Boron has very strong crystalline lattice, so its melting point is unusually high in group elements.
Both (A) and (R) are correct and (R) is the correct explanation of (A)