Which of the following is/are incorrect about diamond?
Which of the following is/are incorrect about diamond?
The correct options are
B Raw diamonds extracted from earth have brilliance
C It is a good conductor of electricity
Raw diamond extracted from earth don't have brilliance and to make them shine, they are first cut and then polished.
There is no free electron left in the diamond crystal to carry electricity. Thus, diamond is a bad conductor of electricity. Heat conductivity in non-metals is due to lattice vibrations (photons). So, when diamond is heated, thermal vibrations are rapidly transmitted through diamond, and it acts as a good conductor of heat.
It is insoluble in all solvents.
It has a high melting point. In order to break strong C-C covalent bonds present in diamond, a large amount of energy is required, hence, the melting point of diamond is very high.
Therefore, (B) and (C) are False.
B
Raw diamonds extracted from earth have brilliance
C
It is a good conductor of electricity
Raw diamond extracted from earth don't have brilliance and to make them shine, they are first cut and then polished.
There is no free electron left in the diamond crystal to carry electricity. Thus, diamond is a bad conductor of electricity. Heat conductivity in non-metals is due to lattice vibrations (photons). So, when diamond is heated, thermal vibrations are rapidly transmitted through diamond, and it acts as a good conductor of heat.
It is insoluble in all solvents.
It has a high melting point. In order to break strong C-C covalent bonds present in diamond, a large amount of energy is required, hence, the melting point of diamond is very high.
Therefore, (B) and (C) are False.
