Graphite

Q. A Graphite has a layer like structure.
B. The distance between two layers in graphite is 20 pm
C. Each layer is composed of planar hexagonal rings
Which of the above statement (s) is /are true?

1. A & C
2. A & B
3. A, B & C
4. only A

Q. In graphite, the electrons are:

1. localised on each carbon-atom
2. localised on every third carbon-atom
   
   
3. delocalised within the layer
4. present in an anti-bonding orbital

Q. In graphite, the electrons are:

1. localised on each carbon-atom
2. localised on every third carbon-atom
   
   
3. delocalised within the layer
4. present in an anti-bonding orbital

Q. Choose the correct statment for graphite :

1. Graphite is used as a dry lubricant
2. Each C atom in hexagonal ring make four sigma bonds with neighboring C atoms
3. Electrons are immobile and localized over the whole sheet.
4. All of the above.

Q. Interlayer distance in graphite is:

1. Very small, the layers being tightly packed
2. More than twice the covalent radius of carbon
3. Many times larger than the covalent radius of carbon
4. The same as the covalent radius of carbon

Q. With respect to diamond and graphite, which of the statements given below is/are correct?

1. Graphite is harder than diamond.
2. Graphite has higher electrical conductivity than diamond
3. Graphite has higher thermal conducitivity than diamond.
4. Graphite has higher C - C bond order than diamond