JEE Main 2024Chemistryp Block Elements (Group 13 & 14)HardMCQ

JEE Main 2024 — p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2024 (27 Jan Shift 1)

Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements.
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 ;

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth (A) and (R) are correct and (R) is the correct explanation of (A)

Step-by-step explanation

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 13 elements.

Both (A) and (R) are correct and (R) is the correct explanation of (A)

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About this question

This is a previous-year question from JEE Main 2024, covering the p Block Elements (Group 13 & 14) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.