Hardest material so far found is (A) Diamond (B) Graphite (C) Carborundum (D) Pumice stone

Hardest material so far found is
(A) Diamond
(B) Graphite
(C) Carborundum
(D) Pumice stone
by

1 Answer

Answer :

(A) Diamond
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Related questions

Hardest materials so far found is (A) Diamond (B) Graphite (C) Carborundum (D) Pumice stone

Description : Hardest materials so far found is (A) Diamond (B) Graphite (C) Carborundum (D) Pumice stone

Last Answer : (A) Diamond

The hardest material just prior to diamond in Mho's scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite

Description : The hardest material just prior to diamond in Mho's scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite

Last Answer : (C) Corundum

The hardest material just prior to diamond in Mhos scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite

Description : The hardest material just prior to diamond in Mhos scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite

Last Answer : (C) Corundum

Which of the following is not an abrasive material? (A) Bakelite (B) Pumice (C) Corundum (D) Carborundum

Description : Which of the following is not an abrasive material? (A) Bakelite (B) Pumice (C) Corundum (D) Carborundum

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Hardest material is - (1) Tungsten (2) Diamond (3) Steel (4) Graphite

Description : Hardest material is - (1) Tungsten (2) Diamond (3) Steel (4) Graphite

Last Answer : (2) Diamond Explanation: Diamondsare commonly known as the hardest substance on earth, used in drill bits for cutting applications.

Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)

Description : Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)

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The hardest form of carbon is (a) Coke (b) Graphite (c) Diamond (d) Charcoal

Description : The hardest form of carbon is (a) Coke (b) Graphite (c) Diamond (d) Charcoal

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The hardest natural substance is - (1) Diamond (2) Iron (3) Graphite (4) Copper

Description : The hardest natural substance is - (1) Diamond (2) Iron (3) Graphite (4) Copper

Last Answer : (1) Diamond Explanation: Diamond is the hardest naturally occurring substance found on Earth. It is due to the giant molecular structure of diamond in which each carbon atom is covalently bonded to four other carbon atoms

Hardest allotrope of carbon is - (1) diamond (2) graphite (3) coke (4) lamp black

Description : Hardest allotrope of carbon is - (1) diamond (2) graphite (3) coke (4) lamp black

Last Answer : (1) diamond Explanation: Diamond is one well known allotrope of carbon. The hardness and high dispersion of light of diamond make it useful for both industrial applications and jewellery. Diamond is ... mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well.

Hardest allotrope of carbon is (1) diamond (2) graphite (3) coke (4) lamp black

Description : Hardest allotrope of carbon is (1) diamond (2) graphite (3) coke (4) lamp black

Last Answer : diamond

Out of (a) Graphite and (b) Carborundum which one is harder ?

Description : Out of (a) Graphite and (b) Carborundum which one is harder ?

Last Answer : Carborundum.

Can you use a beach pebble as a pumice stone?

Description : Can you use a beach pebble as a pumice stone?

Last Answer : It’s probably safe, but pebbles (at least when I think of it) are normally small and smooth; pumice is a little bit rough, and that’s what makes it work.

What would likely to happen if heavy pressure applied when using a pumice stone?

Description : What would likely to happen if heavy pressure applied when using a pumice stone?

Last Answer : If this is about beauty, Skin Care etc, then the likely answeris that you'll cause an abrasion.

What would likely to happen if heavy pressure applied when using a pumice stone?

Description : What would likely to happen if heavy pressure applied when using a pumice stone?

Last Answer : If this is about beauty, Skin Care etc, then the likely answeris that you'll cause an abrasion.

Which stone floats on water? A. Pumice stone (Answer) B. Lime stone C. Basalt stone D. Quartzite stone

Description : Which stone floats on water? A. Pumice stone (Answer) B. Lime stone C. Basalt stone D. Quartzite stone

Last Answer : A. Pumice stone (Answer)

The commonly used material in the manufacture of cement is (A) Sand stone (B) Slate (C) Lime stone (D) Graphite

Description : The commonly used material in the manufacture of cement is (A) Sand stone (B) Slate (C) Lime stone (D) Graphite

Last Answer : (C) Lime stone

Mohs scale hardest is diamond - what's the softest?

Description : Mohs scale hardest is diamond - what's the softest?

Last Answer : Talc

Which of the following is the hardest element? (a) Copper (b) Diamond (c) Iron (d) Silicon

Description : Which of the following is the hardest element? (a) Copper (b) Diamond (c) Iron (d) Silicon

Last Answer : Ans:(b)

The hardest substance available in earth is – (1) Platinum (2) Silicon (3) Diamond (4) Gold

Description : The hardest substance available in earth is – (1) Platinum (2) Silicon (3) Diamond (4) Gold

Last Answer : (3) Diamond Explanation: Diamond is the hardest naturally occurring substance found on Earth. But it is not the hardest substance.

Which of the following is the hardest substance? A. Copper B. Diamond (Answer) C. Iron D. Silicon

Description : Which of the following is the hardest substance? A. Copper B. Diamond (Answer) C. Iron D. Silicon

Last Answer : B. Diamond (Answer)

The hardest rock is (A) Marble (B) Diamond (C) Talc (D) Quartz

Description : The hardest rock is (A) Marble (B) Diamond (C) Talc (D) Quartz

Last Answer : Answer: Option B

The hardest substance available on earth is (1) Platinum (2) Diamond (3) Quartz (4) gold

Description : The hardest substance available on earth is (1) Platinum (2) Diamond (3) Quartz (4) gold

Last Answer : (1) Platinum

Mohs scale hardest substance is diamond - what's the softest

Description : Mohs scale hardest substance is diamond - what's the softest

Last Answer : Talc

What are Carbon, diamond and graphite together called? -General Knowledge

Description : What are Carbon, diamond and graphite together called? -General Knowledge

Last Answer : The answer is 'Allotropes'

Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of graphite is lower than that of diamond.

Description : Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of graphite is lower than that of diamond.

Last Answer : Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of ... False. D. If both Assertion & Reason are false.

What is common between diamond and graphite?

Description : What is common between diamond and graphite?

Last Answer : What is common between diamond and graphite?

Diamond and Graphite

Description : Diamond and Graphite

Last Answer : Find out the difference between : Diamond and Graphite

How do the physical properties of diamond compare to the physical properties of graphite?

Description : How do the physical properties of diamond compare to the physical properties of graphite?

Last Answer : Need answer

How are graphite and diamond the same and how are they different?

Description : How are graphite and diamond the same and how are they different?

Last Answer : They are both made of the element carbon, but the carbon atomsare in a different crystal pattern.

Why do diamond and graphite have different physical properties even though they are both made of carbon?

Description : Why do diamond and graphite have different physical properties even though they are both made of carbon?

Last Answer : Feel Free to Answer

Why is graphite softer than diamond?

Description : Why is graphite softer than diamond?

Last Answer : The crystalline structure of graphite and diamond are very different.

Why is graphite softer than diamond?

Description : Why is graphite softer than diamond?

Last Answer : The crystalline structure of graphite and diamond are very different.

Diamond, graphite, and fullerenes all forms of carbon, are examples of_______.

Description : Diamond, graphite, and fullerenes all forms of carbon, are examples of_______.

Last Answer : Allotropes

Diamond and graphite are

Description : Diamond and graphite are

Last Answer : allotropes of carbon

Carbon occurs in nature in the purest form as (a) Diamond (b) Graphite (c) Carbon black (d) Coal

Description : Carbon occurs in nature in the purest form as (a) Diamond (b) Graphite (c) Carbon black (d) Coal

Last Answer : Ans:(a)

Carbon occurs in nature in the purest form as - (1) Diamond (2) Graphite (3) Carbon black (4) Coal

Description : Carbon occurs in nature in the purest form as - (1) Diamond (2) Graphite (3) Carbon black (4) Coal

Last Answer : (1) Diamond Explanation: There are three forms of pure carbon: Graphite, Coal and Diamond. All three are made up of elemental carbon, caol is the least pure when found in nature. Diamond is the purest form of Carbon.

Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Description : Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Last Answer : (1) Graphite Explanation: Graphite is used as a lubricant due to its slippery nature. Due to its loosely intact carbon atoms or free electrons, they can move around easily from one place to another, making graphite a good conductor of electricity.

As which one of the following, does carbon occur in its purest form in nature? (1) Carbon black (2) Graphite (3) Diamond (4) Coal

Description : As which one of the following, does carbon occur in its purest form in nature? (1) Carbon black (2) Graphite (3) Diamond (4) Coal

Last Answer : (3) Diamond Explanation: The purest form of carbon is neither diamond nor graphene or graphite . It is 'Fullerene' , the purest form of carbon.

Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Description : Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Last Answer : (1) Graphite Explanation: Graphite is used as a lubricant due to its slippery nature. Due to its loosely intact carbon atoms or free electrons, they can move around easily from one place to another, making graphite a good conductor of electricity.

Which of the following is the purest form of Carbon? (1) Charcoal (2) Granite (3) Diamond (4) Graphite

Description : Which of the following is the purest form of Carbon? (1) Charcoal (2) Granite (3) Diamond (4) Graphite

Last Answer : (3) Diamond Explanation: Because the carbon atoms in diamond are more tightly bound than in graphite (as diamond is the hardest material known), it is more difficult for impurities to get into the diamond lattice and as a result diamonds are often more pure than graphite.

_____is not an allotrope of carbon. (1) Buckminsterfullerene (2) Carbon Doxide (3) Diamond (4) Graphite

Description : _____is not an allotrope of carbon. (1) Buckminsterfullerene (2) Carbon Doxide (3) Diamond (4) Graphite

Last Answer : (2) Carbon Doxide Explanation: Carbon is capable of forming many allotropes due to its valency. Well-known forms of carbon include diamond and graphite. Other allotropes in clude: include buckyballs (fullerenes), amorphous carbon, glassy carbon, carbon nanofoam, nanotubes,and others.

Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Description : Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Last Answer : (1) difference in layers of atoms Explanation: Diamond is harder than graphite because diamond has a more complex structure. Diamond's structure is like many pentagons connected together, each pentagon ... together in some way. Graphite's structure is very loose, with its bonds forming layers.

Which one of the following is a good electrical conductor? (1) Graphite (2) Diamond (3) Peat (4) Charcoal

Description : Which one of the following is a good electrical conductor? (1) Graphite (2) Diamond (3) Peat (4) Charcoal

Last Answer : (1) Graphite Explanation: Graphite is a good conductor of electricity because its electrons are delocalized or free to move around. Each carbon atom in graphite is directly linked to only three carbon atoms ... and the fourth is relatively free and can move from one car-bon atom to the other.

The substance which conducts current in the solid state is – (1) diamond (2) graphite (3) iodine (4) sodium chloride

Description : The substance which conducts current in the solid state is – (1) diamond (2) graphite (3) iodine (4) sodium chloride

Last Answer : (2) graphite Explanation: The structure of graphite is unlike most other network substances. It is formed in 'sheets' of carbon atoms, each of which is bonded to only three others. The ... electric charges. Unlike diamond (another carbon allotrope), graphite is an electrical conductor, a. semimetal.

What are Carbon, diamond and graphite together called?

Description : What are Carbon, diamond and graphite together called?

Last Answer : Allotropes

Explain the difference in properties of diamond and graphite on the basis of their Structure?

Description : Explain the difference in properties of diamond and graphite on the basis of their Structure?

Last Answer : Ans.1. Diamond has three dimensional network whereas graphite has two successive layers. 2. Diamond has high density while graphite has low. 3. Diamond has sp3 and graphite has sp2 hybridised carbon atom.

Out of carbon(diamond)and carbon (graphite) whose enthalpy of formation is taken as zero?

Description : Out of carbon(diamond)and carbon (graphite) whose enthalpy of formation is taken as zero?

Last Answer : Ans. Enthalpy of formation of carbon in the form of graphite is taken as zero because it is a more commonly found in stable form of carbon.

Graphite is used as anode and not diamond. Assign reason.

Description : Graphite is used as anode and not diamond. Assign reason. 

Last Answer : Ans. In graphite there are free electrons which helps in electricalconductivity. 

Why is diamond hard whereas graphite soft even through both are crystalline forms of carbon?

Description : Why is diamond hard whereas graphite soft even through both are crystalline forms of carbon?

Last Answer : The reason for difference is because of arrangement of carbon atoms.

Why is diamond hard whereas graphite soft even through both are crystalline forms of carbon?

Description : Why is diamond hard whereas graphite soft even through both are crystalline forms of carbon?

Last Answer : The reason for difference is because of arrangement of carbon atoms.