Graphite

Q. In graphite, each carbon atom is bonded to ______ other carbon atom(s).

1. one
2. two
3. three
4. four

Q.

Assertion (A): Diamond is a good conductor of heat.

Reason (R): Carbon atoms are very closely packed in diamond.

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true, but R is not the correct explanation of A

3. A is true and R is false.

4. A is false and R is true.

Q. If in diamond, there is a unil cell of carbon atoms as FCC and if carbon atom is sp3 what fraction of voids are occupied by carbon atom

Q.

How strong is graphite?

Q. Graphite has a _______ layered structure.

1. hexagonal
2. pentagonal
3. octagonal
4. triagonal

Q. What are allotopes

Q. Graphite is a soft lubricant but is extremely difficult to melt. The reason for this anomalous behaviour is the ______ bonds within its sheet like structure and ______ force between the layers.

1. strong, weak
2. strong, strong
3. weak, weak
4. weak, strong

Q.

Unlike graphite diamond doesn't conduct electricity. Why?

1. Strongest matter on Earth

2. No free ions and electrons

3. Not malleable

4. Diamond is not ductile

Q.

The hybrid states of C in diamond and graphite are respectively:

1. $s{p}^2,s{p}^3$

2. $s{p}^3,s{p}^2$

3. $s{p}^2,s{p}^2$

4. $s{p}^3,s{p}^3$

Q. Graphite has a _______ layered structure.

1. octagonal
2. pentagonal
3. hexagonal
4. triagonal

Q.

Which among the following has the weakest bond?

1. Diamond

2. Neon (Solid)

3. KCl

4. Ice

Q. What is an ionic compounds?

Q.

The structure of diamond and graphite is respectively:

1. 3D-tetrahedral, 3D-tetrahedral

2. 3D-tetrahedral, hexagonal layered

3. 3D-pyramidal, 3D-pyramidal

4. 2D-tetrahedral, hexagonal layered

Q. Graphite is used as a lubricant in machines because it has a very high melting point and also it :

1. is crystalline
2. has layer structure
3. is a giant molecule
4. is a liquid at room temperature

Q.

Assertion (A): Graphite is used as a lubricant.​
Reason (R): It has strong covalent bonds in the sheet-like structure but weak force between its layers.

1. Both A and R are false.​
2. A is true, but R is false.​
3. Both A and R are true, but R is not the correct explanation of A.​
4. Both A and R are true, and R is the correct explanation of A.​

Q. Graphite is a soft lubricant but is extremely difficult to melt. The reason for this anomalous behaviour is the ______ bonds within its sheet like structure and ______ force between the layers.

1. strong, weak
2. strong, strong
3. weak, weak
4. weak, strong

Q. Define interatomic and interionic force of attraction?

Q. is an allotrope of carbon with a hexagonal arrangement of atoms.

1. Graphite
2. Diamond
3. Coal