Diamond

Q. What are the physical properties of diamond?

Q. In diamond, each carbon atom is bonded to other carbon atoms, thus forming a structure.

1. four
2. three
3. tetrahedral
4. hexagonal

Q.

In diamond, each carbon atom is tetrahedrally linked to four other carbon atoms.

1. 

2. 

Q.

Moderate electrical conductivity is shown by

1. Graphite

2. Diamond

3. Silica

4. None of the above

Q. Assertion: Diamond and graphite have the same physical properties.

Reason: Both of them are made from the same element.

1. Both assertion and reason are true but the reason is not the correct explanation for the assertion.
2. Both assertion and reason are true and the reason is the correct explanation for the assertion.
3. The assertion is true but the reason is false.
4. The assertion is false but the reason is true.

Q.

In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?

1. 1

2. 2

3. 4

4. 3

Q.

What type of bonding exists in diamond?

Q.

Name the crystalline and noncrystalline allotropes of carbon.

Q. In diamond, each carbon atom is linked with other carbon atoms.

1. 2
2. 3
3. 4
4. 6

Q.

Pick the odd one out.

Charcoal; coal; graphite; gas carbon

Q. Which of the following statements are true regarding allotropes of carbon?

1. Graphite is extremely harder than diamond.
2. Graphite has higher electrical conductivity than diamond.
3. Graphite has higher thermal conductivity than diamond.
4. Graphite has lower density than diamond.

Q. Which of the following is neither malleable nor ductile?

1. Iron
2. Silver
3. Copper
4. Carbon

Q.

Allotropes of Carbon has different chemical and physical properties. Why is that?

1. Different structure

2. Different bonding pattern

3. Different temperature gradient

4. None of the choices

Q. Statement 1: Pure diamond is the hardest natural substance.

Statement 2: In diamond, every carbon atom is bonded to four neighbouring carbon atoms by covalent bonds.

1. Both statements are correct but statement 2 is not the correct reason for statement.

2. Both statements are correct and statement 2 is the reason for statement 1.

3. Statement 1 is incorrect.
4. Statement 2 is incorrect.

Q.

Statement 1: Fake diamonds are identified easily using the thermal property of diamonds.

Statement 2: Diamond has five times more thermal conductivity than copper.

1. Only statement 1 is true

2. Only statement 2 is true

3. Both statement 1 and statement 2 are wrong

4. Statement 2 is the correct explanation for statement 1

Q.

______ diamond is used to cut glass.

Q.

Name the allotropic form of carbon which is used:

for removal of cataract

Q. Question 4
Buckminsterfullerene is allotropic form of
(a) Phosphorus
(b) Sulphur
(c) Carbon
(d) Tin

Q. Allotropes are made up of ________ elements but have ________ physical properties.

Q.

Which substance falls in the area represented by question mark?

1. Diamond

2. Iodine

3. Flourine

4. Graphite

Q.

it can form 3 bonds(2 pie bonds and 1 sigma bond)

why doesnt carbon form 4 bonds ?

Q. Is diamond good conductor of heat / electricity.Why?

Q. Which among the following characters make graphite a good moderator?

1. Cross-sectional area of graphite is very high
2. Graphite is a good conductor of electricity
3. There is elastic collision between graphite and neutron
4. Graphite has weak van der Waals' force between two layers

Q.

What is the difference between Diamond and Graphite?

Q. Statement 1: Diamond and graphite have the same physical​ properties.
Statement 2: Both of them are made from the same element.​

1. Statement 1 is false, but statement 2 is true​.
2. Statement 1 is true, but statement 2 is false.​
3. Both the statements are false.​
4. Both statement 1 and statement 2 are true.​