Diamond is hard because
Correct answer: C. It is a giant covalent structure
- A. It has a high value of refractive index
- B. All the valence electrons of each carbon atom are involved in bonding
- C. It is a giant covalent structure
- D. It is a crystalline allotrope of carbon
Explanation
Diamond is a form of carbon with a giant covalent structure, where each carbon atom forms four strong covalent bonds, creating a rigid, three-dimensional network that results in exceptional hardness. Option C is correct as it emphasizes the importance of the giant covalent structure. Option A is incorrect because the refractive index relates to optical properties, not hardness. Option B, although true for diamond, does not directly explain its hardness. Option D only describes diamond's allotropy and crystalline nature, which do not fully explain its hardness.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More s-Block and p-Block Elements questions
Which of the following is semiconductor
Beryllium element belongs to the period:
Which of the following oxides of an element is strongly basic in nature?
A gas which burns with a blue flame is
In a network of silica (SiO₂), each silicon atom is surrounded by _ atoms of oxygen
Which pair of elements form acidic oxides