NEET UG CHEMISTRY MCQ: SOLID STATE

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Analyzing +4 | -1

Assertion (A): Covalent crystal have the higher melting point.

Reason (R): Covalent bonds are stronger than ionic bonds.

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Correct option: C

(A) is correct but (R) is not correct

Option C is correct because covalent crystals generally have high melting points due to the strong covalent bonds, but covalent bonds are not always stronger than ionic bonds (e.g., NaCl has a higher lattice energy than diamond).

More Questions from SOLID STATE

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Schottky defect in crystals is observed when Calculate the ionic radius of a

\mathrm{C}{\mathrm{s}^ + }

ion, assuming that the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a

\mathrm{C}{\mathrm{I}^ - }

ion is

\;0.181\,\,nm

Wrong match is A molecule contains atoms

A

and

B

such that

A

occurs at the corners of the cube and

Y

at the face centres. The formula of the molecule is Which species is diamagnetic ? The arrangement ABCABC……is referred to as,