Diamond is harder than graphite because of :

A Difference in layers of atoms
B Tetrahedral structure of diamond
C Difference of crystalline structures<br>
D None of these

Correct Answer: Difference in layers of atoms

Diamond is harder than graphite because diamond has a more complex structure. Diamond’s structure is like many pentagons connected together, each pentagon sharing a side with another pentagon or each pentagon sharing a point with another pentagon. All the points are linked together in some way. Graphite’s structure is very loose, with its bonds forming layers. There will be one sheet of elements bonded together, but then another sheet of bonds of elements will lay on top of that, and there will be very weak bonds holding those sheets together.
Bissoy MCQ
#General Knowledge #Chemistry

Related Questions

কার্বন মৌল হীরা ও গ্রাফাইট-এ ভিন্নরূপ। এদের ক্ষেত্রে কোন উক্তিটি সত্য নয়? (Diamond and graphite are the allotropes of carbon. For them. which of the following statements is incorrect?
A উভয়েই কার্বন মৌল দ্বারা গঠিত। (Both of them are made of carbon.)
B হীরা ও গ্রাফাইটে কার্বন পরমাণুর সংকরায়ন হলো যথাক্রমে sp3 ও sp2 (Hybridization of carbon atom in diamond and graphite are sp3 and sp2, respectively.)
C উভয়ের দহন তাপ একই। (Both of them possesses the same heat of combustion.)
D উভয়ের বিদ্যুৎ পরিবাহিতা ভিন্ন। Both of them possesses different electrical conductivity.)
কার্বন মৌল হীরা ও গ্রাফাইট -এ ভিন্নরূপ। এদের ক্ষেত্রে কোন উক্তিটি সত্য নয়? (Diamond and graphite are the allotropes of carbon. For them, which of the following statements is incorrect?)
A উভয়েই কার্বন মৌল দ্বারা গঠিত। (Both of them are made of carbon )
B হীরা ও গ্রাফাইটে কার্বন পরমাণুর সংকরায়ন হলো যথাক্রমে sp3 ও sp2। (Hybridization of carbon atom in diamond and graphite are sp3 and sp2, respectively.)
C উভয়ের দহন তাপ একই (Both of them possesses the same heat of combustion)
D উভয়ের বিদ্যুৎ পরিবাহিতা ভিন্ন। (Both of them possesses different electrical conductivity)
Diamond cuts diamond .
A সঙ্গ দোষে নষ্ট ।
B সঙ্গ দেখে লোক চেনা যায় ।
C সৎ সঙ্গে স্বর্গ বাস ।
D মানিকে মানিক চেনে ।
Translate the following into Bengali `Diamond cuts diamond'
A সঙ্গ দোষে নষ্ট
B সঙ্গ দেখে লোক চেনা যায়
C মানিকে মানিক চেনে
D সৎ সঙ্গে স্বর্গ বাস
Diamond is a precious metal. Which class of noun diamond belongs to?
A personal
B material
C common
D collective
'Diamond cuts diamond' এর যথার্থ অনুবাদ -
A সঙ্গদোষে নষ্ট
B সংসঙ্গে স্বর্গবাস
C সঙ্গ দোষে লোক চেনা যায়
D মানিকে মানিক চেনে
L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?
A O is the shortest of the group.
B N is the second tallest of the group.
C L is the tallest of the group.
D Q is the third oldest of the group.
Ceramics ca be harder, "light" and more "resistant" to "heat" than "metals". (Find out which quoted part has an error)
A a
B b
C c
D d
Find out which underlined part of the following sentences has an error. Ceramics can be harder, light and more resistant to heat than metals. No Error
A light
B resistant
C heat
D metals
Complete the sentences : "If she had studied harder---"
A she would do well
B she will have done well
C she would have done well
D she would have do well

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