Question

Assertion: SiC has a higher melting point than NaCl.
Reason: SiC has stronger electronic forces of attraction.
(a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
(b) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
(c) Assertion is correct but Reason is incorrect
(d) Both Assertion and Reason are incorrect

Answer 1

Hint: Silicon carbide (SiC), also referred to as carborundum, is a silicon-carbon semiconductor. Moissanite, an exceedingly rare mineral, is found in nature. Since 1893, synthetic SiC powder has been mass-produced as an abrasive. Sintering can bind silicon carbide grains together to form very hard ceramics, which are commonly used in applications requiring high endurance, such as vehicle brakes, car clutches, and bulletproof vest ceramic plates.

Complete answer: A chemical reaction involving the exchange of electron pairs between atoms is known as a covalent bond. Shared pairs or bonding pairs are the stable balance of attractive and repulsive forces between atoms when they exchange electrons, and covalent bonding is the stable balance of attractive and repulsive forces between atoms when they share electrons.
The tetrahedron structure of SiC is similar to that of\[C{H_4}\]. We get a molecule of SiC if we replace the 4H atoms in \[C{H_4}\] with Si. They are held together by a carbon covalent bond. However, a minor ionic bond is formed as well. The carbon atom is slightly negative, while the silicon atom is slightly negative and the Si atom is slightly positive. These evolved polar qualities are close to those of the ${H_2}O$molecule. This relationship is responsible for the heavy adhesion of different layers of a SiC tetrahedron to one another. As a result, SiC has a high melting point and such interactions take a lot of heat to solve.
NaCl, on the other hand, is a solid ionically bonded compound, but it lacks the polar properties of SiC. As a result, the freezing point is lower.
Hence option C is True.

Note:
The full transfer of valence electron(s) between atoms is known as ionic bonding. It's a kind of chemical bond that produces two ions with opposite charges. The metal lacks electrons to become a positively charged cation in ionic bonds, while the nonmetal accepts those electrons to become a negatively charged anion.