Diamond

Q. Give reason :​
(e) Impure diamond is used to cut glass.​ ​

Q. Diamond does not conduct electricity.

1. True

2. False

Q. Which of the following substances are crystalline allotrope of carbon?
(i) Diamond (ii) Charcoal (iii) Graphite (iv) Lamp black (v) Coke (vi) Fullerene

1. (i) to (vi) all
2. (i), (iii) & (vi)
3. (iv), (ii), (v)
4. (i), (ii) & (iv)

Q.

Can Aqua Regia dissolve a diamond?

Q. Which of the following statements are incorrect about diamond?

1. It has a high melting point.
2. It cannot reflect light falling on it.
3. It is a good conductor of electricity.
4. It is used for cutting glasses.

Q. In diamond, each carbon atom is joined to:

1. 2 carbon atoms
2. 4 carbon atoms
3. 1 carbon atom
4. 3 carbon atoms

Q. Which of the following option(s) are characteristics of a diamond?

1. It is a conductor of electricity.
2. It sublimes at 3500${}^{\text{o}}$ C.
3. It has high thermal conductivity.
4. It is very soft.

Q.

What is the melting and boiling point of a diamond?

Q. The structure of diamond is as shown in the image given below:

1. True
2. False

Q.

Which of the following is/are incorrect about diamond?

1. It has a high melting point

2. Raw diamonds extracted from earth have brilliance

3. It is a good conductor of electricity

4. It is insoluble in solvents

Q. Which among the following is not true with respect to diamond?

1. It is soft in nature.
2. It is available in various colours.
3. Its atoms are not arranged in a definite geometrical shape.
4. It is a bad conductor of electricity.

Q.

Name an allotrope of carbon which contains both single and double bonds between carbon atoms.

1. Graphite

2. diamond

3. Fullerene

4. No allotrope meets such a condition.

Q. ____ is used in the tools used for cutting glasses.

1. Fullerene
2. Diamond
3. Graphite
4. Lampblack

Q. Which is/are the characteristic(s) of Diamond?

1. Opaque
2. Hardness
3. Both $A$ and $B$
4. Conductor of electricity