Carbon and Organic Chemistry Fundamentals
Covers carbon properties, allotropes (graphite, diamond, fullerene), organic compound characteristics, and carbon's unique tetravalency and catenation
Questions
Which of the following is incorrect?
- Graphite can be converted to diamond.
- Charcoal, coke and carbon black are all different forms of graphite.
- CO2 can be evolved from graphite, but not from diamond.
- The elements carbon and sulphur react chemically to form the compound carbon disulphide.
Which of the following is an essential element in all organic compounds?
- Nitrogen
- Sulphur
- Carbon
- Oxygen
Lamp black, an amorphous form of carbon is prepared by
- heating kerosene oil in a limited supply of air
- heating wood in excess of air
- destructive distillation of coal
- heating coal in excess of air
Consider the following statements regarding graphite.
I. It is an allotrope of carbon.
II. It is a good conductor of heat and electricity.
III. It can be artificially produced.
Of these statements, which of the following are correct?
- I, II and III are correct.
- I and II are correct.
- I and III are correct.
- II and III are correct.
Common element in all the organic compounds other than H2 is
- nitrogen
- sulphur
- phosphorus
- carbon
Which of the following is used as a material for making protective windows in space probes?
- Tungsten
- Steel
- Graphite
- Diamond
Which of the following is used as a refrigerant?
- Ammonia
- Ether
- Acetone
- Nitrogen
Which of the following substances is used as a lubricant?
- Silica
- Graphite
- Diamond
- Iron oxide
Which of the following is a characteristic feature of organic compound?
- Low melting point
- High melting point
- Soluble in polar solvents
- Insoluble in polar solvents
Which of the following is a man-made allotrope of carbon?
- Graphite
- Diamond
- Silicon
- Fullerene
Why do carbon compounds have low boiling points?
- Due to weak intra-molecular forces
- Due to weak inter-molecular forces
- Due to strong inter- particle forces
- Due to strong inter-molecular forces
Which of the following statements explains why the carbon forms so many compounds?
- Carbon atoms combine readily with oxygen.
- Carbon atoms have very high electro negativity.
- Carbon atoms have low melting and boiling points.
- Carbon readily forms covalent bonds with the other carbon atoms.
Which of the following is not a characteristic of carbon?
- Tetravalency
- Catenation
- Conduction of electricity
- Unstable covalent bonding
Which of the following is not an organic compound?
- CaOCO3
- CH3COOH
- HCOOH
- H3C–CO–CH3
Which of the following bonds is most stable?
- C – C
- C – H
- C – O
- Si – Si
Which of the following substances is the hardest?
- Silver
- Diamond
- Gold
- Platinum
Graphite is a good conductor of electricity due to the presence of
- mobile electrons
- bonded electrons
- strong C-C bonds
- none of the above
The allotropic form of carbon known as charcoal
- is amorphous
- consists of micro-crystals of graphite
- consists of micro-crystals of diamond
- is lighter than water
Graphite is used as a lubricant because
- it is crystalline
- it consists of layers, which readily slip over one another
- it is non-crystalline
- none of the above
Which of the following is a major constituent of LPG?
- Methane
- Octane
- Butane
- Ethane